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Carrera MA, Sánchez LM, Morales MM, Fernández-Alba AR, Hernando MD. Method optimisation for large scope pesticide multiresidue analysis in bee pollen: A pilot monitoring study. Food Chem 2024; 436:137652. [PMID: 37839127 DOI: 10.1016/j.foodchem.2023.137652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/19/2023] [Accepted: 09/30/2023] [Indexed: 10/17/2023]
Abstract
Pesticide contamination in emerging foods and supplements is currently a topic of great interest. This study focused on the evaluation of pesticide residues in commercial bee pollen samples to evaluate the risk associated with their consumption. To this end, an automated clean-up method for the pesticide extracts of bee pollen was developed. An LC-MS/MS and a GC-MS/MS method were validated for the analysis of 353 pesticides in 80 bee pollen samples purchased from different countries. The results showed the presence of 77 different pesticide residues in bee pollen, including plant protection chemicals and veterinary treatments. 85 % of the samples were contaminated with pesticides and no relevant differences were found between conventional and organic samples. Pesticide concentrations exceeding the imposed MRL were found in 40 % of the samples, but the risk assessment showed that consumers are not exposed to an unacceptable risk when consuming the evaluated bee pollen.
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Affiliation(s)
- Maria Antonietta Carrera
- Department of Desertification and Geo-ecology, Experimental Station of Arid Zones, CSIC, Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain
| | - Lorena Manzano Sánchez
- European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables Agrifood Campus of International Excellence (ceiA3), Department of Chemistry and Physics, University of Almeria, Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain
| | - María Murcia Morales
- European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables Agrifood Campus of International Excellence (ceiA3), Department of Chemistry and Physics, University of Almeria, Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain
| | - Amadeo R Fernández-Alba
- European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables Agrifood Campus of International Excellence (ceiA3), Department of Chemistry and Physics, University of Almeria, Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain
| | - María Dolores Hernando
- Department of Desertification and Geo-ecology, Experimental Station of Arid Zones, CSIC, Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain.
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2
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Sahai H, Hernando MD, Martínez Bueno MJ, Aguilera Del Real AM, Fernández-Alba AR. Evaluation of the sorption/desorption processes of pesticides in biodegradable mulch films used in agriculture. Chemosphere 2024; 351:141183. [PMID: 38211793 DOI: 10.1016/j.chemosphere.2024.141183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 12/15/2023] [Accepted: 01/09/2024] [Indexed: 01/13/2024]
Abstract
Microplastics from mulch films can be a source of chemical contamination to agricultural soils. In this context, biodegradable films have been widely positioned as a greener choice. However, their sorption/desorption capabilities, in contrast to the conventional plastic types remain understudied. It is for this reason that objective evaluation of their interactions with residual agricultural contaminants becomes important. Our findings reveal that polyethylene (PE) mulch films retained lower amounts of pesticide residues and demonstrated a higher desorption/release [median desorption = 71.86 μg/L or about 50%], while polybutylene adipate terephthalate (PBAT) mulch films retained higher amounts of pesticide residues onto their surface and demonstrated a much lower desorption [median desorption = 24.27 μg/L or about 17%] after a spraying event. A higher ambient temperature had no significant effect on final desorption amounts in both PE [median = 65.27 μg/L at 20 °C and 74.23 μg/L at 40 °C] and PBAT [median = 24.26 μg/L at 20 °C and 24.78 μg/L at 40 °C] mulch films. However, it did favour a faster desorption pace in PE films. Desorption in PBAT and PE plastic types was correlated with the log Kow value [Spearman's correlation: 0.857 and 0.837 respectively, p < 0.05]. However, only a moderate correlation with pKa was observed in PBAT [Spearman's correlation: 0.478, p < 0.05], while none for PE plastic type. Sorption of pesticides onto biodegradable PBAT microplastics were best explained by Elovich [R2: 0.937-0.959] and pseudo-second order kinetics [R2: 0.942-0.987], suggesting the presence of chemisorption. Furthermore, Weber Morris plots suggested the presence of a multi-step process and Boyd plots indicated that film diffusion or chemical bond formation was the rate-limiting step governing this phenomenon.
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Affiliation(s)
- Harshit Sahai
- Experimental Station of Arid Zones, The Spanish National Research Council (CSIC-EEZA), Ctra. de Sacramento s/n, La Cañada de San Urbano, 04120, Almería, Spain; Agrifood Campus of International Excellence (ceiA3), European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables. Department of Chemistry and Physics, University of Almería, La Cañada de San Urbano, 04120, Almería, Spain; Jozef Stefan International Postgraduate School, Jamova 39, 1000, Ljubljana, Slovenia
| | - María Dolores Hernando
- Experimental Station of Arid Zones, The Spanish National Research Council (CSIC-EEZA), Ctra. de Sacramento s/n, La Cañada de San Urbano, 04120, Almería, Spain
| | - María Jesús Martínez Bueno
- Agrifood Campus of International Excellence (ceiA3), European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables. Department of Chemistry and Physics, University of Almería, La Cañada de San Urbano, 04120, Almería, Spain
| | - Ana M Aguilera Del Real
- Agrifood Campus of International Excellence (ceiA3), European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables. Department of Chemistry and Physics, University of Almería, La Cañada de San Urbano, 04120, Almería, Spain.
| | - Amadeo R Fernández-Alba
- Agrifood Campus of International Excellence (ceiA3), European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables. Department of Chemistry and Physics, University of Almería, La Cañada de San Urbano, 04120, Almería, Spain
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3
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Sahai H, Bueno MJM, Del Mar Gómez-Ramos M, Fernández-Alba AR, Hernando MD. Quantification of nanoplastic uptake and distribution in the root, stem and leaves of the edible herb Lepidum sativum. Sci Total Environ 2024; 912:168903. [PMID: 38013093 DOI: 10.1016/j.scitotenv.2023.168903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/14/2023] [Accepted: 11/24/2023] [Indexed: 11/29/2023]
Abstract
This study confirms the uptake, translocation and bioaccumulation of 100 nm polystyrene nanoplastics in the root, stem and leaves of the plant Lepidum sativum at exposure concentrations ranging from environmentally realistic 10 μg/L up to a high of 100 mg/L. Accumulation in plant tissues was characterised by aggregation in the intercellular spaces and heterogeneous distribution. Nanoplastic presence was confirmed in the root tips, root surface and stele, lateral roots, root hairs, stem vascular bundles, leaf veins and mesophyll, as well as leaf epidermis including stomatal sites. Quantification results show that majority of the particles were retained in the root and accumulation in stem and leaves was only 13 to 18 % of the median value in roots. There was a reduction of 38.89 ± 9.62 % in the germination rate, 55 % in plant fresh weight, as well as in root weight (> 80 %), root length (> 60 %), shoot weight (51 to 78 %) and number of lateral roots (> 28 %) at exposure concentrations at and above 50 mg/L. However, lower, environmentally probable exposure concentrations did not affect the plant health significantly. Our results highlight the urgent need for further exploration of this issue from the point of view of food safety and security. STATEMENT OF ENVIRONMENTAL IMPLICATION: Micro and nanoplastics have been reported in agricultural environments across the globe and reports regarding their hazardous effects over agricultural and plant health call for an urgent exploration of this issue. This work demonstrates the uptake, bioaccumulation and distribution of nanoplastics in an edible plant at an environmentally realistic concentration and raises serious concerns regarding the possible implications for food safety and security. It presents a novel approach which addresses the quantification of nanoplastic accumulation in plant tissues and helps identify the mechanism and trends behind this phenomenon which has been a challenge up until now.
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Affiliation(s)
- Harshit Sahai
- Experimental Station of Arid Zones, The Spanish National Research Council (CSIC-EEZA), Ctra. de Sacramento s/n, La Cañada de San Urbano 04120, Almería, Spain; Jozef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia
| | - María Jesús Martínez Bueno
- Agrifood Campus of International Excellence (ceiA3), European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables, Department of Chemistry and Physics, University of Almería, La Cañada de San Urbano 04120, Almería, Spain
| | - María Del Mar Gómez-Ramos
- Agrifood Campus of International Excellence (ceiA3), European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables, Department of Chemistry and Physics, University of Almería, La Cañada de San Urbano 04120, Almería, Spain
| | - Amadeo R Fernández-Alba
- Agrifood Campus of International Excellence (ceiA3), European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables, Department of Chemistry and Physics, University of Almería, La Cañada de San Urbano 04120, Almería, Spain
| | - María Dolores Hernando
- Experimental Station of Arid Zones, The Spanish National Research Council (CSIC-EEZA), Ctra. de Sacramento s/n, La Cañada de San Urbano 04120, Almería, Spain.
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Carrera MA, Sánchez LM, Morales MM, Fernández-Alba AR, Hernando MD. Corrigendum to "Method optimisation for large scope pesticide multiresidue analysis in bee pollen: A pilot monitoring study" [Food Chem. 436 (2024) 137652]. Food Chem 2024:137929. [PMID: 38278754 DOI: 10.1016/j.foodchem.2023.137929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2024]
Affiliation(s)
- Maria Antonietta Carrera
- Department of Desertification and Geo-ecology, Experimental Station of Arid Zones, CSIC, Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain
| | - Lorena Manzano Sánchez
- European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables Agrifood Campus of International Excellence (ceiA3), Department of Chemistry and Physics, University of Almeria, Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain
| | - María Murcia Morales
- European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables Agrifood Campus of International Excellence (ceiA3), Department of Chemistry and Physics, University of Almeria, Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain
| | - Amadeo R Fernández-Alba
- European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables Agrifood Campus of International Excellence (ceiA3), Department of Chemistry and Physics, University of Almeria, Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain
| | - María Dolores Hernando
- Department of Desertification and Geo-ecology, Experimental Station of Arid Zones, CSIC, Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain.
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Luna A, Murcia-Morales M, Hernando MD, Van der Steen JJM, Fernández-Alba AR, Flores JM. Comparison of APIStrip passive sampling with conventional sample techniques for the control of acaricide residues in honey bee hives. Sci Total Environ 2023; 905:167205. [PMID: 37730056 DOI: 10.1016/j.scitotenv.2023.167205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 09/16/2023] [Accepted: 09/17/2023] [Indexed: 09/22/2023]
Abstract
Western honey bees are very sensitive bioindicators for studying environmental conditions, hence frequently included in many investigations. However, it is very common in both research studies and health surveillance programs to sample different components of the colony, including adult bees, brood and their food reserves. These practices are undoubtedly aggressive for the colony as a whole, and may affect its normal functioning and even compromise its viability. APIStrip-based passive sampling allows long-term monitoring of residues without affecting the colony in any way. In this study, we compared the effectiveness in the control of acaricide residues by using passive and conventional sampling, where the residue levels of the acaricides coumaphos, tau-fluvalinate and amitraz were evaluated. Conventional and APIStrip-based sampling differ in methods for evaluating bee exposure to residues. APIStrip is less invasive than conventional sampling, offers more efficient measurement of environmental contaminants, and can be stored at room temperature, saving costs and minimizing operator error.
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Affiliation(s)
- Alba Luna
- Department of Environment and Agronomy, National Research Council- Institute for Agricultural and Food Research and Technology, CSIC-INIA, 28040 Madrid, Spain; International Doctoral School, Doctorate in Science (Environmental Chemistry line), National University of Distance Education, C/Bravo Murillo 38, Madrid, Spain.
| | - María Murcia-Morales
- Department of Chemistry and Physics, University of Almería, Agrifood Campus of International Excellence (ceiA3), Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain.
| | - María Dolores Hernando
- Department of Desertification and Geoecology, Arid Zones Experimental Station, EEZA-CSIC, 04120 Almería, Spain.
| | | | - Amadeo R Fernández-Alba
- Department of Chemistry and Physics, University of Almería, Agrifood Campus of International Excellence (ceiA3), Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain.
| | - José Manuel Flores
- Department of Zoology, University of Córdoba, Campus of Rabanales, 14071 Córdoba, Spain.
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Flores JM, Luna A, Rodríguez Fernández-Alba A, Hernando MD. Acceptance by Honey Bees of Wax Decontaminated through an Extraction Process with Methanol. Insects 2023; 14:593. [PMID: 37504599 PMCID: PMC10380593 DOI: 10.3390/insects14070593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 06/27/2023] [Accepted: 06/29/2023] [Indexed: 07/29/2023]
Abstract
Honey bees face serious threats. These include the presence of the Varroa destructor mite in hives, which requires the use of acaricides to control. The constant recycling of old wax exacerbates the problem, and results in the accumulation of residues in the beeswax, which is a problem for the viability of the colony. The same happens with the accumulation of phytosanitary residues. In a previous study, we implemented an efficient wax decontamination method using a batch methanol extraction method. The present study evaluates the acceptance of the decontaminated wax by the bees for comb building, brood, honey and pollen containment. The results show a slight delay in the start of comb building and small changes were observed in the pharmacopoeia of the decontaminated wax compared to the original commercial wax. The slight delay in the acceptance of the decontaminated wax could be due to the loss of some components, such as honey residues, which usually appear in the wax. The addition of bee-attractive substances to the manufacturing process could help to mitigate the delay. The results suggest that the use of decontaminated wax is a good alternative to reduce the concentration of residues in hives.
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Affiliation(s)
- José Manuel Flores
- Department of Zoology, University of Córdoba, Campus of Rabanales, 14071 Córdoba, Spain
| | - Alba Luna
- Department of Environment and Agronomy, National Research Council-Institute for Agricultural and Food Research and Technology, CSIC-INIA, Crta. Coruña Km. 7.5, 28040 Madrid, Spain
- International Doctoral School, Doctorate in Science (Environmental Chemistry Line), National University of Distance Education, C/Bravo Murillo 38, 28015 Madrid, Spain
| | - Antonio Rodríguez Fernández-Alba
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, Alcala University, University Campus, Ctra. Madrid-Barcelona Km 33.600 E-28871, 28801 Alcalá de Henares, Spain
| | - María Dolores Hernando
- Department of Desertification and Geoecology, Arid Zones Experimental Station, EEZA-CSIC, Crta. de Sacramento s/n. La Cañada de San Urbano, 04120 Almería, Spain
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Sahai H, García Valverde M, Murcia Morales M, Hernando MD, M Aguilera Del Real A, Fernández-Alba AR. Exploring sorption of pesticides and PAHs in microplastics derived from plastic mulch films used in modern agriculture. Chemosphere 2023; 333:138959. [PMID: 37209851 DOI: 10.1016/j.chemosphere.2023.138959] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/25/2023] [Accepted: 05/15/2023] [Indexed: 05/22/2023]
Abstract
The sorption and vector effect of microplastics on the transfer of pesticides and polycyclic aromatic hydrocarbons (PAHs), as well as its impact on agriculture remain largely unexplored. This comparative study is first to investigate the sorption behavior of different pesticides and PAHs at environmentally realistic concentrations by model microplastics and microplastics derived from polyethylene mulch films. Sorption was found to be up to 90% higher in the case of microplastics derived from mulch films as opposed to pure polyethylene microspheres. For microplastics from mulch films, the sorption percentages for pesticides in media containing CaCl2 were reported to be: pyridate (75.68% and 52.44%), fenazaquin (48.54% and 32.02%), pyridaben (45.04% and 56.70%), bifenthrin (74.27% and 25.88%), etofenprox (82.16% and 54.16%) and pyridalyl (97.00% and 29.74%) at 5 μg/L and 200 μg/L pesticide concentration levels respectively. For PAHs, the sorption amounts were: naphthalene (22.03% and 48.00%), fluorene (38.99% and 39.00%), anthracene (64.62% and 68.02%) and pyrene (75.65% and 86.38%) at 5 μg/L and 200 μg/L PAH concentration levels respectively. Sorption was influenced by the octanol-water partition coefficient (log Kow) and ionic strength. Kinetics of the process in the case of sorption of pesticides were best explained by pseudo-first order kinetic model (R2 between 0.90 and 0.98) while the best fitting isotherm model was Dubinin-Radushkevich (R2 between 0.92 and 0.99). Results suggest the presence of surface level physi-sorption through a micropore volume filling mechanism and the role of hydrophobic and electrostatic forces. Pesticide desorption data in polyethylene mulch films indicate that pesticides with high log Kow were almost completely retained in mulch films, while those with lower log Kow were desorbed rapidly into the surrounding media. Our study highlights the role of microplastics from plastic mulch films as vectors for pesticide and PAH transport at environmentally realistic concentrations and the factors that influence it.
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Affiliation(s)
- Harshit Sahai
- Experimental Station of Arid Zones, The Spanish National Research Council (CSIC-EEZA), Ctra. de Sacramento S/n, La Cañada de San Urbano, 04120, Almería, Spain; Department of Chemistry and Physics. University of Almería. Agrifood Campus of International Excellence (ceiA3). Ctra Sacramento S/n La Cañada de San Urbano, 04120, Almería, Spain; Jozef Stefan International Postgraduate School, Jamova 39, 1000, Ljubljana, Slovenia
| | - Mar García Valverde
- Department of Chemistry and Physics. University of Almería. Agrifood Campus of International Excellence (ceiA3). Ctra Sacramento S/n La Cañada de San Urbano, 04120, Almería, Spain
| | - María Murcia Morales
- Department of Chemistry and Physics. University of Almería. Agrifood Campus of International Excellence (ceiA3). Ctra Sacramento S/n La Cañada de San Urbano, 04120, Almería, Spain
| | - María Dolores Hernando
- Experimental Station of Arid Zones, The Spanish National Research Council (CSIC-EEZA), Ctra. de Sacramento S/n, La Cañada de San Urbano, 04120, Almería, Spain
| | - Ana M Aguilera Del Real
- Department of Chemistry and Physics. University of Almería. Agrifood Campus of International Excellence (ceiA3). Ctra Sacramento S/n La Cañada de San Urbano, 04120, Almería, Spain.
| | - A R Fernández-Alba
- Department of Chemistry and Physics. University of Almería. Agrifood Campus of International Excellence (ceiA3). Ctra Sacramento S/n La Cañada de San Urbano, 04120, Almería, Spain
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Luna A, Flores JM, Miguel E, Fernández-Alba AR, Hernando MD. Coumaphos residue transfer to honey bee brood (Apis mellifera) in realistic scenarios. Res Vet Sci 2023; 159:106-124. [PMID: 37116382 DOI: 10.1016/j.rvsc.2023.04.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 04/20/2023] [Indexed: 04/30/2023]
Abstract
Coumaphos is a veterinary treatment administered for the control of Varroa destructor in honey bee colonies. The detection of its residues, however, has been frequently reported in beeswax. This study is pioneer to investigate whether the honey bee brood is exposed to coumaphos via contact or by ingestion of food resources due to a residue transfer inside the bee hive. This field study addresses two scenarios: 1) after its administration according to the posology using strips inside the bee hives and, 2) placing contaminated wax containing coumaphos at 10 mg/Kg into the bee hives (simulating the use of recycled wax). In bee bread, the average concentrations of residues (mean ± s.d.) were 246.66 ± 772.29 ng/g and 192.55 ± 320.19 ng/g in scenario 1 and 2, respectively. In honey, residue concentration was 1.98 ± 5.41 ng/g and 1.93 ± 6.59 ng/g. In scenario 2, exposure has led to residue detection in all larval stages at concentrations ranging from 51.93 to 383.42 ng/g (larvae), 42.20-58.54 ng/g (prepupae), 18.35-26.24 ng/g (pupae) to 21.92-35.92 ng/g (born bee). This study shows that there is a high risk for the bee brood (larvae) by ingestion of bee bread when the residue concentration is >251.31 ng/g. Residue levels in larvae or in prepupae >42.20 ng/g give rise to a moderate risk.
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Affiliation(s)
- Alba Luna
- Department of Environment and Agronomy, National Research Council- Institute for Agricultural and Food Research and Technology, CSIC-INIA, 28040 Madrid, Spain; International Doctoral School, Doctorate in Science (Environmental Chemistry line), National University of Distance Education, C/ Bravo Murillo 38, Madrid, Spain.
| | - José Manuel Flores
- Department of Zoology, University of Córdoba, Campus of Rabanales, 14071 Córdoba, Spain.
| | - Esther Miguel
- Department of Environment and Agronomy, National Research Council- Institute for Agricultural and Food Research and Technology, CSIC-INIA, 28040 Madrid, Spain.
| | - Antonio Rodríguez Fernández-Alba
- Applied Chemistry and Biotechnology Center, Alcala University, University Campus, Ctra. Madrid-Barcelona km 33.600 E-28871, Alcalá de Henares, Madrid, Spain.
| | - María Dolores Hernando
- Department of Environment and Agronomy, National Research Council- Institute for Agricultural and Food Research and Technology, CSIC-INIA, 28040 Madrid, Spain; Department of Desertification and Geoecology, Arid Zones Experimental Station, CSIC-EEZA, 04120 Almería, Spain.
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Giannioti Z, Albero B, Hernando MD, Bontempo L, Pérez RA. Determination of Regulated and Emerging Mycotoxins in Organic and Conventional Gluten-Free Flours by LC-MS/MS. Toxins (Basel) 2023; 15:155. [PMID: 36828469 PMCID: PMC9966797 DOI: 10.3390/toxins15020155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/07/2023] [Accepted: 02/11/2023] [Indexed: 02/16/2023] Open
Abstract
Gluten-free cereal products have grown in popularity in recent years as they are perceived as "healthier" alternatives and can be safely consumed by celiac patients, and people with gluten intolerance or wheat allergies. Molds that produce mycotoxins contaminate cereal crops, posing a threat to global food security. Maximum levels have been set for certain mycotoxins in cereal flours; however, little is known about the levels of emerging mycotoxins in these flours. The aim of this study was to develop an efficient, sensitive, and selective method for the detection of four emerging (beauvericin and enniatins A1, B, and B1) and three regulated (aflatoxin B1, zearalenone, and deoxynivalenol) mycotoxins in gluten-free flours. Ultrasound-assisted matrix solid-phase dispersion was used in the extraction of these mycotoxins from flour samples. The validated method was utilized for the LC-MS/MS analysis of conventional and organic wholegrain oat and rice flours. Six of the seven target mycotoxins were detected in these samples. Multi-mycotoxin contamination was found in all flour types, particularly in conventional wholegrain oat flour. Despite the low detection frequency in rice flour, one sample was found to contain zearalenone at a concentration of 83.2 μg/kg, which was higher than the level set by the European Commission for cereal flours. The emerging mycotoxins had the highest detection frequencies; enniatin B was present in 53% of the samples at a maximum concentration of 56 μg/kg, followed by enniatin B1 and beauvericin, which were detected in 46% of the samples, and at levels reaching 21 μg/kg and 10 μg/kg, respectively. These results highlight the need to improve the current knowledge and regulations on the presence of mycotoxins, particularly emerging ones, in gluten-free flours and cereal-based products.
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Affiliation(s)
- Zoe Giannioti
- Traceability Unit, Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38098 San Michele all’Adige, TN, Italy
- Centre for Agriculture, Food and Environment (C3A), University of Trento and Fondazione Edmund Mach Via E. Mach 1, 38098 San Michele all’Adige, TN, Italy
| | - Beatriz Albero
- Department of Environment and Agronomy, National Institute for Agricultural and Food Research and Technology (INIA), Spanish National Research Council (CSIC), Carretera de La Coruña Km 7.5, 28040 Madrid, Spain
| | - María Dolores Hernando
- Department of Environment and Agronomy, National Institute for Agricultural and Food Research and Technology (INIA), Spanish National Research Council (CSIC), Carretera de La Coruña Km 7.5, 28040 Madrid, Spain
| | - Luana Bontempo
- Traceability Unit, Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38098 San Michele all’Adige, TN, Italy
| | - Rosa Ana Pérez
- Department of Environment and Agronomy, National Institute for Agricultural and Food Research and Technology (INIA), Spanish National Research Council (CSIC), Carretera de La Coruña Km 7.5, 28040 Madrid, Spain
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Flores JM, Gámiz V, Jiménez-Marín Á, Flores-Cortés A, Gil-Lebrero S, Garrido JJ, Hernando MD. Impact of Varroa destructor and associated pathologies on the colony collapse disorder affecting honey bees. Res Vet Sci 2021; 135:85-95. [PMID: 33454582 DOI: 10.1016/j.rvsc.2021.01.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 09/29/2020] [Accepted: 01/03/2021] [Indexed: 11/19/2022]
Abstract
Varroa mite is the major threat to the western honey bee, Apis mellifera, and the cause of significant economic losses in the apiculture industry. Varroa destructor feeds on brood and adult bees being responsible for vectoring virus infections and other diseases. This study analyses the role of Varroa and other associated pathogens, such as viruses or the fungus Nosema ceranae, and their relationships regarding the viability of the bee colony. It has been carried out during one beekeeping season, with the subspecies A. m. iberiensis, commonly used in the apiculture industry of Spain. Our study shows a significant relationship between the presence of Varroa destructor and viral infection by deformed wing virus and acute bee paralysis virus. Nosema ceranae behaved as an opportunistic pathogen. In addition, this study explored a potential naturally occurring subset of peptides, responsible for the humoral immunity of the bees. The expression of the antimicrobial peptides abaecin and melittin showed a significant relationship with the levels of Varroa mite and the deformed wing virus.
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Affiliation(s)
- José M Flores
- Department of Zoology, Faculty of Veterinary, University of Córdoba, Campus of Rabanales, 14071 Córdoba, Spain.
| | - Victoria Gámiz
- Department of Zoology, Faculty of Veterinary, University of Córdoba, Campus of Rabanales, 14071 Córdoba, Spain
| | - Ángeles Jiménez-Marín
- Department of Genetic, Faculty of Veterinary, Grupo de Genómica y Mejora Animal, University of Córdoba, Campus of Rabanales, 14071 Córdoba, Spain
| | - Alicia Flores-Cortés
- Department of Genetic, Faculty of Veterinary, Grupo de Genómica y Mejora Animal, University of Córdoba, Campus of Rabanales, 14071 Córdoba, Spain
| | - Sergio Gil-Lebrero
- Department of Zoology, Faculty of Veterinary, University of Córdoba, Campus of Rabanales, 14071 Córdoba, Spain
| | - Juan J Garrido
- Department of Genetic, Faculty of Veterinary, Grupo de Genómica y Mejora Animal, University of Córdoba, Campus of Rabanales, 14071 Córdoba, Spain
| | - María Dolores Hernando
- National Institute for Agricultural and Food Research and Technology (INIA), 28040 Madrid, Spain
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11
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Alonso-Prados E, Muñoz I, De la Rúa P, Serrano J, Fernández-Alba AR, García-Valcárcel AI, Hernando MD, Alonso Á, Alonso-Prados JL, Bartolomé C, Maside X, Barrios L, Martín-Hernández R, Higes M. The toxic unit approach as a risk indicator in honey bees surveillance programmes: A case of study in Apis mellifera iberiensis. Sci Total Environ 2020; 698:134208. [PMID: 31505351 DOI: 10.1016/j.scitotenv.2019.134208] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Revised: 08/28/2019] [Accepted: 08/29/2019] [Indexed: 06/10/2023]
Abstract
The influence of genetic diversity and exposure to xenobiotics on the prevalence of pathogens was studied within the context of a voluntary epidemiological study in Spanish apiaries of Apis mellifera iberiensis, carried out during the spring season of years 2014 and 2015. As such, the evolutionary lineages of the honey bee colonies were identified, a multiresidue analysis of xenobiotics was carried out in beebread and worker bee samples, and the Toxic Unit (TUm) was estimated for each sampled apiary. The relationship between lineages and the most prevalent pathogens (Nosema ceranae, Varroa destructor, trypanosomatids, Black Queen Cell Virus; and Deformed Wing Virus) was analysed with contingency tables, and the possible relationships between TUm and the prevalence of these pathogens were studied by using a factor analysis. The statistical analysis supported the associations between V. destructor and Deformed Wing Virus (DWV), and between N. ceranae and Black Queen Cell Virus (BQCV), but the association between these pathogens and trypanosomatids was not observed. TUm values varied between 5.5 × 10-6 and 3.65 × 10-1. When TUm < 3.35 × 10-4, it was mainly determined by coumaphos, tau-fluvalinate and/or chlorfenvinphos. At higher values, other insecticides also contributed to TUm, although a clear predominance was not seen up to TUm ≥ 1.83 × 10-2, when it was mainly defined by acrinathrin, spinosad and/or imidacloprid. The possible cumulative effect from the joint action of xenobiotics was >10% in the 63% of the cases. The prevalence of pathogens did not appear to be influenced by the distribution of evolutionary lineages and, while the prevalence of V. destructor was not found to be determined by TUm, there was a trend towards an increasing prevalence of N. ceranae when TUm ≥ 23 10-4. This study is an example of using TUm approach beyond the field of the ecotoxicology.
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Affiliation(s)
- Elena Alonso-Prados
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, INIA, 28040 Madrid, Spain.
| | - Irene Muñoz
- Área de Biología Animal, Dpto. Zoología y Antropología Física, Facultad de Veterinaria, Universidad de Murcia, 30100 Murcia, Spain
| | - Pilar De la Rúa
- Área de Biología Animal, Dpto. Zoología y Antropología Física, Facultad de Veterinaria, Universidad de Murcia, 30100 Murcia, Spain
| | - José Serrano
- Área de Biología Animal, Dpto. Zoología y Antropología Física, Facultad de Veterinaria, Universidad de Murcia, 30100 Murcia, Spain
| | - Amadeo R Fernández-Alba
- Agrifood Campus of International Excellence (ceiA3), Department of Chemistry and Physics, University of Almería, European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables, 04120 Almería, Spain
| | | | - María Dolores Hernando
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, INIA, 28040 Madrid, Spain
| | - Ángeles Alonso
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, INIA, 28040 Madrid, Spain
| | - José L Alonso-Prados
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, INIA, 28040 Madrid, Spain
| | - Carolina Bartolomé
- Grupo de Medicina Xenómica, CIMUS, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain; Grupo de Xenómica Comparada de Parásitos Humanos, IDIS, Santiago de Compostela, Galicia, Spain
| | - Xulio Maside
- Grupo de Medicina Xenómica, CIMUS, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain; Grupo de Xenómica Comparada de Parásitos Humanos, IDIS, Santiago de Compostela, Galicia, Spain; Departamento de Ciencias Forenses, Anatomía Patolóxica, Xinecoloxía e Obstetricia, e Pediatría, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain
| | - Laura Barrios
- Departamento de Estadística, CTI. Consejo Superior de Investigaciones Científicas (CSIC), 28006 Madrid, Spain
| | - Raquel Martín-Hernández
- Instituto de Recursos Humanos para la Ciencia y la Tecnología (INCRECYT-FEDER), Fundación Parque Científico y Tecnológico de Castilla - La Mancha, Spain; Laboratorio de Patología Apícola, Centro de Investigación Apícola y Agroambiental (CIAPA), Instituto Regional de Investigación y Desarrollo Agroalimentario y Forestal (IRIAF), Consejería de Agricultura de la Junta de Comunidades de Castilla-La Mancha, Camino de San Martín s/n, 19180 Marchamalo, Guadalajara, Spain
| | - Mariano Higes
- Instituto de Recursos Humanos para la Ciencia y la Tecnología (INCRECYT-FEDER), Fundación Parque Científico y Tecnológico de Castilla - La Mancha, Spain
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12
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Gómez-Ramos MM, Ucles S, Ferrer C, Fernández-Alba AR, Hernando MD. Exploration of environmental contaminants in honeybees using GC-TOF-MS and GC-Orbitrap-MS. Sci Total Environ 2019; 647:232-244. [PMID: 30081361 DOI: 10.1016/j.scitotenv.2018.08.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 08/01/2018] [Accepted: 08/01/2018] [Indexed: 06/08/2023]
Abstract
This study reports an analytical approach by gas chromatography and high-resolution mass spectrometry (HRMS) intended to be used for investigation of non-targeted environmental contaminants in honeybees. The approach involves a generic extraction and analysis with two GC-HRMS systems: time-of-flight and Orbitrap analyzers, GC-TOF-MS, and GC-Orbitrap-MS operated in electron-impact ionization (EI) mode. The workflow for screening of non-targeted contaminants consisted of initial peak detection by deconvolution and matching the first-stage mass spectra EI-MS with a nominal mass spectral library. To gain further confidence in the structural characterization of the contaminants under investigation, molecular formula of representative ions (molecular and fragment ions) was provided for those with an accurate mass scoring (error < 5 ppm). This methology was applied for screening environmental contaminants in 75 samples of adult honeybee. This approach has provided the tentative identification of environmental contaminants belonging to different chemical groups, among them, PAHs, phthalates and synthetic musks. Residues of veterinary treatments used in apiculture were also detected in the honeybee samples.
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Affiliation(s)
- M M Gómez-Ramos
- Chemistry and Physics Department, University of Almeria, Agrifood Campus of International Excellence (ceiA3), 04120 Almería, Spain
| | - S Ucles
- Chemistry and Physics Department, University of Almeria, Agrifood Campus of International Excellence (ceiA3), 04120 Almería, Spain
| | - C Ferrer
- Chemistry and Physics Department, University of Almeria, Agrifood Campus of International Excellence (ceiA3), 04120 Almería, Spain
| | - A R Fernández-Alba
- Chemistry and Physics Department, University of Almeria, Agrifood Campus of International Excellence (ceiA3), 04120 Almería, Spain
| | - M D Hernando
- National Institute for Agricultural and Food Research and Technology - INIA, 28040 Madrid, Spain.
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13
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Hakme E, Lozano A, Gómez-Ramos MM, Hernando MD, Fernández-Alba AR. Non-target evaluation of contaminants in honey bees and pollen samples by gas chromatography time-of-flight mass spectrometry. Chemosphere 2017; 184:1310-1319. [PMID: 28679151 DOI: 10.1016/j.chemosphere.2017.06.089] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 06/16/2017] [Accepted: 06/19/2017] [Indexed: 06/07/2023]
Abstract
This work presents a non-targeted screening approach for the detection and quantitation of contaminants in bees and pollen, collected from the same hive, by GC-EI-ToF-MS. It consists of a spectral library datasets search using a compound database followed by a manual investigation and analytical standard confirmation together with semi-quantitation purposes. Over 20% of the compounds found automatically by the library search could not be confirmed manually. This number of false positive detections was mainly a consequence of an inadequate ion ratio criterion (±30%), not considered in the automatic searching procedure. Eight compounds were detected in bees and pollen. They include insecticides/acaricides (chlorpyrifos, coumaphos, fluvalinate-tau, chlorfenvinphos, pyridaben, and propyl cresol) at a concentration range of 1-1207 μg kg-1, herbicides (oxyfluorfen) at a concentration range of 212-1773 μg kg-1 and a growth regulator hormone (methoprene). Some compounds were detected only in pollen; such as herbicides (clomazone), insecticides/acaricides and fungicides used to control Varroa mites as benzylbenzoate, bufencarb, allethrin, permethrin, eugenol and cyprodinil. Additional compounds were detected only in bees: flamprop-methyl, 2-methylphenol (2-49 μg kg-1) and naphthalene (1-23 μg kg-1). The proposed method presents important advantages as it can avoid the use of an unachievable number of analytical standards considered target compounds "a priori" but not present in the analyzed samples.
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Affiliation(s)
- E Hakme
- University of Almeria, Agrifood Campus of International Excellence (ceiA3), 04120, Almería, Spain
| | - A Lozano
- University of Almeria, Agrifood Campus of International Excellence (ceiA3), 04120, Almería, Spain
| | - M M Gómez-Ramos
- University of Almeria, Agrifood Campus of International Excellence (ceiA3), 04120, Almería, Spain
| | - M D Hernando
- National Institute for Agricultural and Food Research and Technology (INIA), 28040, Madrid, Spain
| | - A R Fernández-Alba
- University of Almeria, Agrifood Campus of International Excellence (ceiA3), 04120, Almería, Spain.
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14
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Gómez-Ramos MM, García-Valcárcel AI, Tadeo JL, Fernández-Alba AR, Hernando MD. Screening of environmental contaminants in honey bee wax comb using gas chromatography-high-resolution time-of-flight mass spectrometry. Environ Sci Pollut Res Int 2016; 23:4609-4620. [PMID: 26527334 DOI: 10.1007/s11356-015-5667-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 10/20/2015] [Indexed: 06/05/2023]
Abstract
This study reports an analytical approach intended to be used for investigation of non-targeted environmental contaminants and to characterize the organic pollution pattern of bee wax comb samples. The method comprises a generic extraction followed by detection with gas chromatography coupled to high-resolution time-of-flight mass spectrometry (GC-TOF-MS), operated in electron impact ionization (EI) mode. The screening approach for the investigation of non-targeted contaminants consisted of initial peak detection by deconvolution and matching the first-stage mass spectra EI-MS(1) with a nominal mass spectral library. To gain further confidence in the structural characterization of the contaminants under investigation, the molecular formula of representative ions (molecular ion when present in the EI spectrum) and, for at least other two fragment ions, was provided for those with an accurate mass scoring (mass error < 5 ppm). This methodology was applied for screening environmental contaminants in 50 samples of bee wax comb. This approach has allowed the tentative identification of some GC-amenable contaminants belonging to different chemical groups, among them, phthalates and polycyclic aromatic hydrocarbons (PAHs), along with residues of veterinary treatments used in apiculture.
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Affiliation(s)
- M M Gómez-Ramos
- European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables, University of Almeria, Agrifood Campus of International Excellence (ceiA3), 04120, Almería, Spain
| | - A I García-Valcárcel
- National Institute for Agricultural and Food Research and Technology-INIA, 28040, Madrid, Spain
| | - J L Tadeo
- National Institute for Agricultural and Food Research and Technology-INIA, 28040, Madrid, Spain
| | - A R Fernández-Alba
- European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables, University of Almeria, Agrifood Campus of International Excellence (ceiA3), 04120, Almería, Spain
| | - M D Hernando
- National Institute for Agricultural and Food Research and Technology-INIA, 28040, Madrid, Spain.
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15
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López SH, Ulaszewska MM, Hernando MD, Martínez Bueno MJ, Gómez MJ, Fernández-Alba AR. Post-acquisition data processing for the screening of transformation products of different organic contaminants. Two-year monitoring of river water using LC-ESI-QTOF-MS and GCxGC-EI-TOF-MS. Environ Sci Pollut Res Int 2014; 21:12583-12604. [PMID: 24952251 DOI: 10.1007/s11356-014-3187-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 06/09/2014] [Indexed: 06/03/2023]
Abstract
This study describes a comprehensive strategy for detecting and elucidating the chemical structures of expected and unexpected transformation products (TPs) from chemicals found in river water and effluent wastewater samples, using liquid chromatography coupled to electrospray ionization quadrupole-time-of-flight mass spectrometer (LC-ESI-QTOF-MS), with post-acquisition data processing and an automated search using an in-house database. The efficacy of the mass defect filtering (MDF) approach to screen metabolites from common biotransformation pathways was tested, and it was shown to be sufficiently sensitive and applicable for detecting metabolites in environmental samples. Four omeprazole metabolites and two venlafaxine metabolites were identified in river water samples. This paper reports the analytical results obtained during 2 years of monitoring, carried out at eight sampling points along the Henares River (Spain). Multiresidue monitoring, for targeted analysis, includes a group of 122 chemicals, amongst which are pharmaceuticals, personal care products, pesticides and PAHs. For this purpose, two analytical methods were used based on direct injection with a LC-ESI-QTOF-MS system and stir bar sorptive extraction (SBSE) with bi-dimensional gas chromatography coupled with a time-of-flight spectrometer (GCxGC-EI-TOF-MS).
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Affiliation(s)
- S Herrera López
- European Union Reference Laboratory for Pesticide Residues in Fruits and Vegetables, University of Almeria, Agrifood Campus of International Excellence (ceiA3), 04120, Almería, Spain
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Herrera-Lopez S, Hernando MD, García-Calvo E, Fernández-Alba AR, Ulaszewska MM. Simultaneous screening of targeted and non-targeted contaminants using an LC-QTOF-MS system and automated MS/MS library searching. J Mass Spectrom 2014; 49:878-93. [PMID: 25230185 DOI: 10.1002/jms.3428] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 06/25/2014] [Accepted: 06/29/2014] [Indexed: 05/27/2023]
Abstract
Simultaneous high-resolution full-scan and tandem mass spectrometry (MS/MS) analysis using time of flight mass spectrometry brings an answer for increasing demand of retrospective and non-targeted data analysis. Such analysis combined with spectral library searching is a promising tool for targeted and untargeted screening of small molecules. Despite considerable extension of the panel of compounds of tandem mass spectral libraries, the heterogeneity of spectral data poses a major challenge against the effective usage of spectral libraries. Performance evaluation of available LC-MS/MS libraries will significantly increase credibility in the search results. The present work was aimed to evaluate fluctuation of MS/MS pattern, in the peak intensities distribution together with mass accuracy measurements, and in consequence, performance compliant with ion ratio and mass error criteria as principles in identification processes for targeted and untargeted contaminants at trace levels. Matrix effect and ultra-trace levels of concentration (from 50 ng l(-1) to 1000 ng l(-1) were evaluated as potential source of inaccuracy in the performance of spectral matching. Matrix-matched samples and real samples were screened for proof of applicability. By manual review of data and application of ion ratio and ppm error criteria, false negatives were obtained; this number diminished when in-house library was used, while with on-line MS/MS databases 100% of positive samples were found. In our experience, intensity of peaks across spectra was highly correlated to the concentration effect and matrix complexity. In turn, analysis of spectra acquired at trace concentrations and in different matrices results in better performance in providing correct and reliable identification.
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Affiliation(s)
- S Herrera-Lopez
- Pesticide Residues Research Group, European Union Reference Laboratory (EURL), Department of Chemistry and Physics, University of Almería, 04120, La Cañada de San Urbano, Almería, Spain; IMDEA-Water (Madrid Institute for Advanced Studies-Water), University of Alcalá, 28805, Alcalá de Henares, Madrid, Spain
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17
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Uclés A, Martínez Bueno MJ, Ulaszewska MM, Hernando MD, Ferrer C, Fernández-Alba AR. Quantitative determination of poly(amidoamine) dendrimers in urine by liquid chromatography/electrospray ionization hybrid quadrupole linear ion trap mass spectrometry. Rapid Commun Mass Spectrom 2013; 27:2519-2529. [PMID: 24123640 DOI: 10.1002/rcm.6713] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 08/18/2013] [Accepted: 08/19/2013] [Indexed: 06/02/2023]
Abstract
RATIONALE Dendrimer nanocarriers have become of increasing interest in the field of biomedicine for their drug delivery potential. Surface modifications and optimized nanosize control are the strategies being followed to enhance drug delivery efficacy and renal clearance, especially for dendrimers of a lower generation number. The aim of this study was the development and performance evaluation of an analytical method for the quantitative determination of polyamidoamine (PAMAM) dendrimers in urine. METHODS PAMAM dendrimers (generations G0 to G3) were analyzed using liquid chromatography/electrospray ionization hybrid quadrupole linear ion trap mass spectrometry (LC/ESI-QqLIT-MS). Quantitative analysis was performed in selected reaction monitoring (SRM) mode. To confer a higher degree of confidence on the identification of PAMAM dendrimers, an SRM scan and collision-induced dissociation (CID), as a dependent scan, were performed in one single run using the information-dependent acquisition (IDA) mode. RESULTS The LC/ESI-QqLIT-MS method, in SRM mode, allowed quantitative determination in urine matrix with good repeatability and reproducibility (relative standard deviation (R.S.D.) from 2 to 15%), linearity (R >0.99) over the concentration range (6∙10-4 to 5∙10-2 mmol.L-1 ), and sensitivity within the micromolar range. The detection limit values were above 1∙10-4 mmol.L-1 in both solvent and urine, for the generations studied. CONCLUSIONS The developed method has demonstrated a capability for the identification and quantification of PAMAM dendrimer nanoparticles in a complex liquid matrix. The use of an LC/ESI-QqLIT-MS system, of modest m/z range and unit resolution, offers an alternative in the analysis of lower generation PAMAM dendrimers between mass analyzers of higher resolution and the conventional LC-UV method that is commonly applied for dendrimer quantification, but which lacks sufficient identification capacity. Copyright © 2013 John Wiley & Sons, Ltd.
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Affiliation(s)
- Ana Uclés
- Pesticide Residues Research Group, European Union Reference Laboratory (EURL), Department of Chemistry and Physics, University of Almería, 04120 La Cañada de San Urbano, Almería, Spain; IMDEA-Water (Madrid Institute for Advanced Studies-Water), Parque Científico Tecnológico, University of Alcalá, 28805, Alcalá de Henares, Madrid, Spain
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18
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Herrera López S, Hernando MD, Gómez MJ, Santiago-Morales J, Rosal R, Fernández-Alba AR. Investigation of Galaxolide degradation products generated under oxidative and irradiation processes by liquid chromatography/hybrid quadrupole time-of-flight mass spectrometry and comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry. Rapid Commun Mass Spectrom 2013; 27:1237-1250. [PMID: 23650037 DOI: 10.1002/rcm.6575] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 03/15/2013] [Accepted: 03/17/2013] [Indexed: 06/02/2023]
Abstract
RATIONALE Polycyclic musks have become a concern due to their bioaccumulation potential and ecotoxicological effects. The HHCB transformation product (TP) (1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethyl-cyclopenta[γ]-2-benzopyran; HHCB-lactone) is the most stable intermediate generated and it is frequently detected in river waters. The aim of this work was the identification of relevant TPs generated from UV irradiation and ozone treatments. METHODS Identification of HHCB TPs was carried out by liquid chromatography/hybrid quadrupole time-of-flight mass spectrometry (LC/ESI-QTOF-MS) and two-dimensional gas chromatography/electron impact time-of-flight mass spectrometry (GC×GC-EI-TOF-MS). With LC/ESI-QTOF-MS, TPs were characterized by means of mass accuracy in both full-scan and MS/MS modes through information-dependent acquisition (IDA) and direct injection on-column. With stir bar sorptive extraction (SBSE)-GC×GC-EI-TOF-MS, identification was based on the enhanced separation capacity and screening of unknowns through the acquisition of full-range mass spectra. RESULTS The effectiveness of these complementary techniques allowed a detailed evaluation of the main TPs. Eighteen TPs were elucidated based on mass accuracy, in both full-scan and MS/MS modes using LC/ESI-QTOF-MS with mass errors below 5 ppm and 10 ppm (mostly), respectively. Most of the TPs had not been analytically identified in previous studies. Separation of the enantiomeric species (R) and (S) of HHCB-lactone, and the identification of other relevant TPs, was performed using SBSE-GC×GC-EI-TOF-MS. CONCLUSIONS LC/ESI-QTOF-MS and GC×GC-EI-TOF-MS analysis provides the best alternative for TP identification of chemicals of concern, which have a wide range of polarities and isobaric compounds. A prediction of PBT (persistence, bioaccumulation and toxicity) using the PBT Profiler program suggested a classification of 'very persistent' and 'very toxic' for most of the TPs identified.
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Affiliation(s)
- S Herrera López
- IMDEA-Water (Madrid Institute for Advanced Studies-Water), Punto Net, Edificio ZYE 2º, Parque Científico Tecnológico, Madrid, Spain
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Martínez Bueno MJ, Ulaszewska MM, Gomez MJ, Hernando MD, Fernández-Alba AR. Simultaneous measurement in mass and mass/mass mode for accurate qualitative and quantitative screening analysis of pharmaceuticals in river water. J Chromatogr A 2012; 1256:80-8. [PMID: 22901300 DOI: 10.1016/j.chroma.2012.07.038] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Revised: 06/19/2012] [Accepted: 07/15/2012] [Indexed: 10/28/2022]
Abstract
A new approach for the analysis of pharmaceuticals (target and non-target) in water by LC-QTOF-MS is described in this work. The study has been designed to assess the performance of the simultaneous quantitative screening of target compounds, and the qualitative analysis of non-target analytes, in just one run. The features of accurate mass full scan mass spectrometry together with high MS/MS spectral acquisition rates - by means of information dependent acquisition (IDA) - have demonstrated their potential application in this work. Applying this analytical strategy, an identification procedure is presented based on library searching for compounds which were not included a priori in the analytical method as target compounds, thus allowing their characterization by data processing of accurate mass measurements in MS and MS/MS mode. The non-target compounds identified in river water samples were ketorolac, trazodone, fluconazole, metformin and venlafaxine. Simultaneously, this strategy allowed for the identification of other compounds which were not included in the library by screening the highest intensity peaks detected in the samples and by analysis of the full scan TOF-MS, isotope pattern and MS/MS spectra - the example of loratadine (histaminergic) is described. The group of drugs of abuse selected as target compounds for evaluation included analgesics, opioids and psychostimulants. Satisfactory results regarding sensitivity and linearity of the developed method were obtained. Limits of detection for the selected target compounds were from 0.003 to 0.01 μg/L and 0.01 to 0.5 μg/L, in MS and MS/MS mode, respectively - by direct sample injection of 100 μL.
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Affiliation(s)
- M J Martínez Bueno
- Fundación IMDEA-Agua, C/Punto Net 4, 2ª planta, Edificio ZYE, Parque Científico Tecnológico de Universidad de Alcalá, 28805 Alcalá de Henares, Madrid, Spain
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Bueno MJM, Gomez MJ, Herrera S, Hernando MD, Agüera A, Fernández-Alba AR. Occurrence and persistence of organic emerging contaminants and priority pollutants in five sewage treatment plants of Spain: two years pilot survey monitoring. Environ Pollut 2012; 164:267-73. [PMID: 22387188 DOI: 10.1016/j.envpol.2012.01.038] [Citation(s) in RCA: 248] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Revised: 01/18/2012] [Accepted: 01/22/2012] [Indexed: 05/11/2023]
Abstract
This work summarized all results obtained during almost two-years of a monitoring programme carried out in five municipal sewage treatment plants (STPs) located in the north, centre and south-east of Spain. The study evaluated the occurrence and persistence of a group of 100 organic compounds belonging to several chemical groups (pharmaceuticals, personal care products, pesticides and metabolites). The average removal efficiencies of the STPs studied varied from 20% (erythromycin) to 99% (acetaminophen). In analysed samples, we identified a large number of compounds at mean range concentrations between 7-59,495 ng/L and 5-32,720 ng/L for influent and effluent samples, respectively. This study also identified 20 of the mostly detected and persistent compounds in wastewater effluent, of which hydrochlorothiazide, atenolol, gemfibrozil, galaxolide and three metabolites (fenofibric acid, 4-AAA and 4-FAA), presented the highest average contribution percentages, in relation to the total load of contaminants for the different STPs effluent studied.
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Affiliation(s)
- M J Martínez Bueno
- Pesticide Residues Research Group, Department of Hydrogeology and Analytical Chemistry, University of Almería, 04120 La Cañada de San Urbano, Almería, Spain
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21
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Bueno MJM, Uclés S, Hernando MD, Dávoli E, Fernández-Alba AR. Evaluation of selected ubiquitous contaminants in the aquatic environment and their transformation products. A pilot study of their removal from a sewage treatment plant. Water Res 2011; 45:2331-41. [PMID: 21333319 DOI: 10.1016/j.watres.2011.01.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Revised: 01/10/2011] [Accepted: 01/13/2011] [Indexed: 05/15/2023]
Abstract
A simple method using direct sample injection combined with liquid chromatography tandem mass spectrometry has been developed for the simultaneous analysis of six alkaloid compounds in environmental samples. The target list includes two psychostimulants (nicotine and caffeine), three metabolites (cotinine, nicotinic acid and paraxanthine) and a coffee chemical (trigonelline). The analytical method was evaluated in three different matrices (surface water, influent and effluent wastewater). The method developed showed an adequate sensitivity, below 0.6 μg L(-1) for wastewater and 0.1 μg L(-1) for river matrices, without any prior treatment of the samples. Finally, the methodology was applied to real samples for evaluation of their removal from a sewage treatment plant and their persistence/fate in the aquatic environment. All compounds studied in this work were detected at all sampling points collected along the Henares River. However, nicotinic acid was only detected three times in treated sewage samples at levels above its detection limit.
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Affiliation(s)
- M J Martínez Bueno
- Pesticide Residues Research Group, Department of Hydrogeology and Analytical Chemistry, University of Almería, 04120 La Cañada de San Urbano, Almería, Spain
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Martínez Bueno MJ, Herrera S, Uclés A, Agüera A, Hernando MD, Shimelis O, Rudolfsson M, Fernández-Alba AR. Determination of malachite green residues in fish using molecularly imprinted solid-phase extraction followed by liquid chromatography–linear ion trap mass spectrometry. Anal Chim Acta 2010; 665:47-54. [DOI: 10.1016/j.aca.2010.03.001] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Revised: 02/02/2010] [Accepted: 03/01/2010] [Indexed: 11/28/2022]
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Bueno MJM, Agüera A, Hernando MD, Gómez MJ, Fernández-Alba AR. Evaluation of various liquid chromatography-quadrupole-linear ion trap-mass spectrometry operation modes applied to the analysis of organic pollutants in wastewaters. J Chromatogr A 2009; 1216:5995-6002. [DOI: 10.1016/j.chroma.2009.06.047] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2008] [Revised: 06/10/2009] [Accepted: 06/12/2009] [Indexed: 10/20/2022]
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Rosal R, Rodríguez A, Perdigón-Melón JA, Mezcua M, Hernando MD, Letón P, García-Calvo E, Agüera A, Fernández-Alba AR. Removal of pharmaceuticals and kinetics of mineralization by O(3)/H(2)O(2) in a biotreated municipal wastewater. Water Res 2008; 42:3719-3728. [PMID: 18657843 DOI: 10.1016/j.watres.2008.06.008] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2008] [Revised: 06/03/2008] [Accepted: 06/06/2008] [Indexed: 05/26/2023]
Abstract
The ozonation of an effluent from the secondary clarifier of two Municipal Wastewater Treatment Plants was performed by using alkaline ozone and a combination of ozone and hydrogen peroxide. Alkaline ozonation achieved only a moderate degree of mineralization, essentially concentrated during the first few minutes; but the addition of hydrogen peroxide eventually led to a complete mineralization. The evolution of total organic carbon (TOC) as a measure of the extent of mineralization and the concentration of dissolved ozone were analyzed and linked in a kinetic model whose parameter represented the product of the exposure to hydroxyl radicals and the kinetic constant of indirect ozonation. This rate parameter yielded the highest values during the first part of O(3)/H(2)O(2) runs. The kinetic constant for the decomposition of ozone at the end of the run was also measured and computed for the non-oxidizable water matrix and yielded essentially the same values regardless of whether or not hydrogen peroxide was used. A group of 33 organic compounds, mainly pharmaceuticals and some relevant metabolites present in the wastewater effluents, were evaluated before and after the ozonation process using a liquid chromatography-hybrid triple-quadrupole linear ion trap system (LC-QqLIT-MS). The results demonstrate that the ozonation degrades these compounds with efficiencies of over 99% in most cases, even under low mineralization conditions in alkaline ozonation.
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Affiliation(s)
- R Rosal
- Department of Chemical Engineering, University of Alcalá, 28771 Alcalá de Henares, Spain.
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Pérez-Estrada LA, Agüera A, Hernando MD, Malato S, Fernández-Alba AR. Photodegradation of malachite green under natural sunlight irradiation: kinetic and toxicity of the transformation products. Chemosphere 2008; 70:2068-2075. [PMID: 17959225 DOI: 10.1016/j.chemosphere.2007.09.008] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2007] [Revised: 09/04/2007] [Accepted: 09/05/2007] [Indexed: 05/25/2023]
Abstract
This article describes the photolytic degradation of malachite green (MG), a cationic triphenylmethane dye used worldwide as a fungicide and antiseptic in the aquaculture industry. Photolysis experiments were performed by direct exposure of a solution of MG in water to natural sunlight. The main transformation products (TPs) generated during the process were identified by liquid chromatography time-of-flight mass spectrometry (LC-TOF-MS) and gas chromatography mass spectrometry (GC-MS). The 28 TPs identified with this strategy indicate that MG undergoes three main reactions, N-demethylation, hydroxylation and cleavage of the conjugated structure forming benzophenone derivatives. These processes involve hydroxyl radical attack on the phenyl ring, the N,N-dimethylamine group and the central carbon atom. The Vibrio fischeri acute toxicity test showed that the solution remains toxic after MG has completely disappeared. This toxicity could be assigned, at least in part, to the formation of 4-(dimethylamine)benzophenone, which has an EC(50,30 min) of 0.061 mg l(-1), and is considered "very toxic to aquatic organisms" by current EU legislation.
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Affiliation(s)
- L A Pérez-Estrada
- Plataforma Solar de Almería-CIEMAT, Carretera Senés Km. 4, 04200 Tabernas, Spain
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Gómez MJ, Martínez Bueno MJ, Agüera A, Hernando MD, Fernández-Alba AR, Mezcua M. Evaluation of ozone-based treatment processes for wastewater containing microcontaminants using LC-QTRAP-MS and LC-TOF/MS. Water Sci Technol 2008; 57:41-48. [PMID: 18192739 DOI: 10.2166/wst.2008.809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
This article describes the development of an enhanced liquid chromatography-mass spectrometry (LC-MS) method for the analysis of a selected group of 57 organic contaminants in wastewater. This group comprises 39 pharmaceuticals belonging to different therapeutical classes and 10 of their most frequent metabolites. Six pesticides and two disinfectants were also included. The LC-MS method was developed using a hybrid quadrupole/linear ion trap (Q TRAP) analyzer operating in selected reaction monitoring (SRM) mode (in both positive and negative electrospray ionization) in combination with a time-of flight (TOF) mass analyser. The application of both techniques provided very good results in terms of accurate quantification and unequivocal identification. Quantification was based on the use of a linearly accelerating (LINAC) high-pressure collision cell, which enable the analysis of a high number of compounds with enough acquisition data points for an optimal peak definition in SRM. Unequivocal identification was provided by the acquisition of at least two SRM transitions and by obtaining accurate mass measurements of the identified compounds with errors lower than 2 ppm. As an alternative for compounds where a second transition cannot be detected by Q-Trap-MS, the application of survey scans in enhanced product ion (EPI) was evaluated. The analytical performance of the method was evaluated in effluent wastewater samples. Linearity of response over three orders of magnitude was demonstrated (R2>0.99 for most compounds). Matrix effects resulting in suppression of the response were frequently observed, between 2-50% for most of compounds, except 4-DAA and 4-AA, which exhibit higher values (68%). Signal enhancement was also detected in 16 compounds. Method limits of detection (LOD) were between 0.1-50 ng L(-1). Finally, the methodology was successfully applied to the evaluation of the efficiency of two ozone-based treatments applied to the effluent from the secondary clarifier of a municipal wastewater treatment facility. Preliminary results are presented demonstrating that ozonation of wastewaters degrade pharmaceuticals with a high efficiency. Removals higher than 90% were reached for most of target analytes.
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Affiliation(s)
- M J Gómez
- Department of Analytical Chemistry, University of Almería, 04120, Almería, Spain.
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27
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Martínez Bueno MJ, Agüera A, Gómez MJ, Hernando MD, García-Reyes JF, Fernández-Alba AR. Application of Liquid Chromatography/Quadrupole-Linear Ion Trap Mass Spectrometry and Time-of-Flight Mass Spectrometry to the Determination of Pharmaceuticals and Related Contaminants in Wastewater. Anal Chem 2007; 79:9372-84. [DOI: 10.1021/ac0715672] [Citation(s) in RCA: 250] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- María Jesús Martínez Bueno
- Pesticide Residues Research Group, Department of Hydrogeology and Analytical Chemistry, University of Almería, 04120 La Cañada de San Urbano, Almería, Spain
| | - Ana Agüera
- Pesticide Residues Research Group, Department of Hydrogeology and Analytical Chemistry, University of Almería, 04120 La Cañada de San Urbano, Almería, Spain
| | - María José Gómez
- Pesticide Residues Research Group, Department of Hydrogeology and Analytical Chemistry, University of Almería, 04120 La Cañada de San Urbano, Almería, Spain
| | - María Dolores Hernando
- Pesticide Residues Research Group, Department of Hydrogeology and Analytical Chemistry, University of Almería, 04120 La Cañada de San Urbano, Almería, Spain
| | - Juan Francisco García-Reyes
- Pesticide Residues Research Group, Department of Hydrogeology and Analytical Chemistry, University of Almería, 04120 La Cañada de San Urbano, Almería, Spain
| | - Amadeo R. Fernández-Alba
- Pesticide Residues Research Group, Department of Hydrogeology and Analytical Chemistry, University of Almería, 04120 La Cañada de San Urbano, Almería, Spain
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28
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Hernando MD, Ferrer C, Ulaszewska M, García-Reyes JF, Molina-Díaz A, Fernández-Alba AR. Application of high-performance liquid chromatography–tandem mass spectrometry with a quadrupole/linear ion trap instrument for the analysis of pesticide residues in olive oil. Anal Bioanal Chem 2007; 389:1815-31. [PMID: 17713761 DOI: 10.1007/s00216-007-1464-z] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2007] [Revised: 06/18/2007] [Accepted: 06/21/2007] [Indexed: 11/30/2022]
Abstract
This article describes the development of an enhanced liquid chromatography-mass spectrometry (LC-MS) method for the analysis of pesticides in olive oil. One hundred pesticides belonging to different classes and that are currently used in agriculture have been included in this method. The LC-MS method was developed using a hybrid quadrupole/linear ion trap (QqQ(LIT)) analyzer. Key features of this technique are the rapid scan acquisition times, high specificity and high sensitivity it enables when the multiple reaction monitoring (MRM) mode or the linear ion-trap operational mode is employed. The application of 5 ms dwell times using a linearly accelerating (LINAC) high-pressure collision cell enabled the analysis of a high number of pesticides, with enough data points acquired for optimal peak definition in MRM operation mode and for satisfactory quantitative determinations to be made. The method quantifies over a linear dynamic range of LOQs (0.03-10 microg kg(-1)) up to 500 microg kg(-1). Matrix effects were evaluated by comparing the slopes of matrix-matched and solvent-based calibration curves. Weak suppression or enhancement of signals was observed (<15% for most-80-of the pesticides). A study to assess the identification criteria based on the MRM ratio was carried out by comparing the variations observed in standard vs matrix (in terms of coefficient of variation, CV%) and within the linear range of concentrations studied. The CV was lower than 15% when the response observed in solvent was compared to that in olive oil. The limit of detection was < or =10 microg kg(-1) for five of the selected pesticides, < or =5 microg kg(-1) for 14, and < or =1 microg kg(-1) for 81 pesticides. For pesticides where additional structural information was necessary for confirmatory purposes-in particular at low concentrations, since the second transition could not be detected-survey scans for enhanced product ion (EPI) and MS3 were developed.
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Affiliation(s)
- M D Hernando
- Department of Analytical Chemistry, University of Almería, 04120 Almería, Spain
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29
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Hernando MD, De Vettori S, Martínez Bueno MJ, Fernández-Alba AR. Toxicity evaluation with Vibrio fischeri test of organic chemicals used in aquaculture. Chemosphere 2007; 68:724-30. [PMID: 17292447 DOI: 10.1016/j.chemosphere.2006.12.097] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2006] [Revised: 11/08/2006] [Accepted: 12/31/2006] [Indexed: 05/09/2023]
Abstract
The evaluation of acute toxicity by Vibrio fischeri test for different organic chemicals (antibiotics, pesticides, therapeutants, herbicides) commonly applied in aquaculture and a degradation product of surfactants, 4-nonylphenol, is presented in this work. Simazine, atrazine, emamectin benzoate and leucomalachite green have no toxic effects on V. fischeri at the concentration tested (up to 6mgl(-1)) which correspond to the maximum water solubility. Ciprofloxacin, terbutryn and deltamethrin, caused inhibition effects of 28%, 22% and 30% at concentrations up to 5mgl(-1). Toxic effects were not observed in the case of flumequine and oxolinic acid at the maximum concentration tested (0.189mgl(-1)). According to the toxicity categories established in the EU legislation, ciprofloxacin, terbutryn and deltamethrin could be considered non-harmful for V. fischeri. Malachite green and 4-nonylphenol are "very toxic to aquatic organisms" (EC(50,30min)=0.031mgl(-1) and 0.48mgl(-1), respectively). Carbaryl is "toxic to aquatic organisms" (2.4mgl(-1)). and glyphosate is harmful to V. fischeri (EC(50,30min)=44.2mgl(-1)). The matrix effect was evaluated comparing the toxicity measurements of the target compounds solubilized in seawater and distilled water. Malachite green, 4-nonylphenol and glyphosate, showed higher toxicity in distilled water than in seawater. Carbaryl was more toxic in seawater. All the compounds tested in seawater were not harmful at concentrations of ngl(-1) (10 and 50). However, 4-nonlylphenol and malachite green may act as toxic compounds in the environment at a low ppb level, since both may be detected in water at this concentration level.
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Affiliation(s)
- M D Hernando
- Department of Analytical Chemistry, University of Almeria, 04120 Almeria, Spain.
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30
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Hernando MD, Suárez-Barcena JM, Bueno MJM, Garcia-Reyes JF, Fernández-Alba AR. Fast separation liquid chromatography-tandem mass spectrometry for the confirmation and quantitative analysis of avermectin residues in food. J Chromatogr A 2007; 1155:62-73. [PMID: 17524410 DOI: 10.1016/j.chroma.2007.02.120] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2006] [Revised: 01/26/2007] [Accepted: 02/05/2007] [Indexed: 10/23/2022]
Abstract
A new residue analytical method for the confirmation and quantification of avermectin residues in food is described in this article. This method allows a fast analysis for the determination of avermectin residues, abamectin (ABM), ivermectin (IVM), emamectin benzoate (EMA) and doramectin (DOR) by liquid chromatography-tandem mass spectrometry (LC-MS/MS). Separation was performed using a short column of 1.8 microm particle size. The hybrid quadrupole/linear ion trap (QqQ(LIT)) system via the linearly accelerating (LINAC) high-pressure collision cell, allows the MS detection in multiple reaction monitoring (MRM) mode operating in fast scan acquisition times. The effect of reduced dwell times on mass spectral quality and sensitivity is evaluated in this study. For quantitative purposes, the influence of dwell time on S/N ratio and peak area was observed. ABM, IVM, EMA and DOR show an increased trend of peak area and S/N ratio, when dwell times are of 50 ms against 10-20 ms, suited when the number of compounds to be analyzed is higher. The sensitivity achieved by using the LC-MS/MS system is enough for the confirmation of avermectin residues in the selected commodities (salmon muscle and pepper) at trace concentration levels (sub-microg/kg and microg/kg) and therefore a sample pre-concentration step was not necessary. The instrumental limits of quantification (ILQ) are in the range of 0.15-5 ppb. Samples were extracted by solid-liquid extraction (SLE) procedure using acetonitrile, and cleaned-up using alumina. The average recoveries obtained were acceptable (80-95%). The calibration curves were linear over the working range from ILQs to 500 microg/kg. For the quantitative analysis, matrix-matched calibration and dilution of SLE extracts was proven as reliable alternative to compensate matrix-effects and for its feasible application in routine analysis.
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Affiliation(s)
- M D Hernando
- Department of Analytical Chemistry, University of Almería, 04120 Almería, Spain
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Mezcua M, Ferrer I, Hernando MD, Fernández-Alba AR. Photolysis and photocatalysis of bisphenol A: identification of degradation products by liquid chromatography with electrospray ionization/time-of-flight/mass spectrometry (LC/ESI/ToF/MS). ACTA ACUST UNITED AC 2006; 23:1242-51. [PMID: 17071528 DOI: 10.1080/02652030600889541] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Bisphenol A is a commonly known endocrine-disrupting compound detected in environmental water samples. The persistence of this compound has been studied by photolysis and photocatalysis studies. In this work, several experiments were performed in order to identify the degradation products under various conditions and in different types of matrices (deionized and waste water). These studies included the influence of sodium hypochlorite (NaClO), commonly present in drinking water, on the generation of chlorine by-products of bisphenol A. The effect of catalyses in solar degradation studies was evaluated as well. The identification of the degradation products was accomplished by liquid chromatography/time-of-flight/mass spectrometry (LC-ToF-MS), which provided highly selective information about elemental compositions. Accurate mass measurements for three main degradation products permitted the postulation of proposed empirical formula in this study. Some of the degradation products were formed in waste water matrices, thus suggesting their potential presence in environmental conditions and in drinking water.
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Affiliation(s)
- M Mezcua
- Department of Analytical Chemistry, University of Almería, Carretera Sacramenta s/n, La Cañada de San Urbano, 04120 Almería, Spain.
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Hernando MD, Agüera A, Fernández-Alba AR. LC-MS analysis and environmental risk of lipid regulators. Anal Bioanal Chem 2006; 387:1269-85. [PMID: 17047939 DOI: 10.1007/s00216-006-0781-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2006] [Revised: 08/01/2006] [Accepted: 08/15/2006] [Indexed: 10/24/2022]
Abstract
This article presents a review of liquid chromatography-mass spectrometric (LC-MS) methods applied to the determination of lipid-regulating agents, "fibrate" and "statin" classes, and some of their metabolites (clofibric acid and fenofibric acid) in environmental samples. Concentration levels of this therapeutical group have been reported in the ppt to ppb range for different compartments (wastewater, surface water and sediments) in several monitoring studies. Part of this article is dedicated to hazard assessment of lipid-regulating agents according to the approaches of the European Union (EU) and Environmental Protection Agency (EPA) for identifying persistent, bioaccumulable and toxic (PBT) substances. The pharmacodynamic and pharmacokinetic activities of these pharmaceuticals are well known and, based on this information, the derivation of the potential long-term effects, which may be induced on eco-organisms at low concentration levels, is discussed. Studies of environmental risk assessment (ERA) for lipid regulators carried out through the framework of the European Agency for the Evaluation of Medicinal Products (EMEA) and Food and Drug Administration (FDA) are presented.
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Affiliation(s)
- M D Hernando
- Department of Analytical Chemistry, University of Almería, 04120 Almería, Spain.
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Hernando MD, Heath E, Petrovic M, Barceló D. Trace-level determination of pharmaceutical residues by LC-MS/MS in natural and treated waters. A pilot-survey study. Anal Bioanal Chem 2006; 385:985-91. [PMID: 16568292 DOI: 10.1007/s00216-006-0394-5] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2005] [Revised: 02/17/2006] [Accepted: 02/21/2006] [Indexed: 10/24/2022]
Abstract
A pilot-survey study was performed by collecting samples (influent and effluent wastewaters, rivers and tap waters) from different locations in Europe (Spain, Belgium, Germany and Slovenia). A solid-phase extraction (SPE) followed by liquid chromatography-tandem mass spectrometry method was applied for the determination of pharmaceuticals (ibuprofen, naproxen, ketoprofen, diclofenac and clofibric acid). Method detection limits and method quantification limits were at the parts-per-trillion level (7.5-75 ng/L). The recovery rates of the SPE from deionized water and effluent wastewater samples spiked at 100- and 1,000-ng/L levels ranged from 87 to 95%. Identification criteria in compliance with the EU regulation for confirmatory methods of organic residues were applied. A detailed study of signal suppression evaluation for analysis of pharmaceutical residues in effluent wastewaters is presented.
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Affiliation(s)
- M D Hernando
- Department of Environmental Chemistry, IIQAB-CSIC, 08034 Barcelona, Spain.
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Hernando MD, Petrovic M, Fernández-Alba AR, Barceló D. Analysis by liquid chromatography-electrospray ionization tandem mass spectrometry and acute toxicity evaluation for beta-blockers and lipid-regulating agents in wastewater samples. J Chromatogr A 2004; 1046:133-40. [PMID: 15387181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
This paper describes a multiresidue method for the extraction and determination of two therapeutic groups of pharmaceuticals, lipid-regulating agents (clofibric acid, bezafibrate, gemfibrocil, fenofibrate) and beta-blockers (atenolol, sotalol, metoprolol, betaxolol) in waters by solid-phase extraction followed by liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI-MS-MS). Recoveries obtained from spiked HPLC water, as well as, from spiked real samples (sewage treatment plants influent and effluents, river and tap water) were all above 60%, with the exception of betaxolol with a 52% recovery. The quantitative MS analysis was performed using a multiple reaction monitoring. The LC-MS-MS method gave detection limits ranging from 0.017 to 1.25 microg/l in spiked effluent. Precision of the method, calculated as relative standard deviation, ranged from 3.7 to 18.5%. Individual and combined effects on Daphnia magna were evaluated for both therapeutic groups. Individual effects in culture medium showed these compounds as not harmful and not toxic, an exception is fenofibrate that was found to be harmful, but at high, in the environment unrealistic concentrations (EC50 of 50 mg/l). Combined effect in wastewater showed synergistic toxic effects at low concentration level (2 microg/l).
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Affiliation(s)
- M D Hernando
- Department of Environmental Chemistry IIQAB-CSIC, c/Jordi, Girona 18-26, 08034 Barcelona, Spain.
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Hernando MD, Mezcua M, Gómez MJ, Malato O, Agüera A, Fernández-Alba AR. Comparative study of analytical methods involving gas chromatography–mass spectrometry after derivatization and gas chromatography–tandem mass spectrometry for the determination of selected endocrine disrupting compounds in wastewaters. J Chromatogr A 2004; 1047:129-35. [PMID: 15481468 DOI: 10.1016/j.chroma.2004.06.123] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Two GC-MS methods, based on the application of N,O-bis(trimethylsilyl)trifluoroacetamide-derivatization-GC-MS (selected-ion monitoring) and GC-MS-MS without derivatization, respectively, were optimised and applied to the determination of a group of five selected endocrine disrupting compounds (EDCs) in wastewaters. Both methods included solid-phase extraction with Oasis HLB cartridges allowing an enrichment factor for wastewater samples of 100-fold. The investigated EDCs were estrone, 17beta-estradiol, 17alpha-ethynylestradiol, 4-tert-octylphenol and bisphenol A. Results obtained from the validation studies yielded comparable results in both cases. Recoveries in spiked wastewaters at 50 ng/l were higher than 90% for all the compounds, except for 4-tert-octylphenol (75%). Repeatability and reproducibility were adequate, varying from 1.6 to 14%, except for estrone which reproducibility was 28% when the derivatization-GC-MS method was applied. Limits of detection calculated ranged from 2.5 to 27.5 ng/l with differences between both methods from 1.1 (estrone) to 10.4 (bisphenol A) times. Both methods were successfully applied to the analysis of the target compounds in sewage treatment plant influents and effluents. Traces of bisphenol A, 4-tert-octylphenol, estrone and 17beta-estradiol were detected at concentration levels ranging from 13.3 to 1105.2 ng/l.
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Affiliation(s)
- M D Hernando
- Pesticide Residue Research Group, University of Almería, 04071 Almería, Spain
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Hernando MD, Ejerhoon M, Fernández-Alba AR, Chisti Y. Combined toxicity effects of MTBE and pesticides measured with Vibrio fischeri and Daphnia magna bioassays. Water Res 2003; 37:4091-4098. [PMID: 12946890 DOI: 10.1016/s0043-1354(03)00348-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Methyl-tert-butyl ether (MTBE), a fuel oxygenate that is added to gasoline, commonly contaminates aquatic systems, many of which are already contaminated with pesticides. The toxic effects (EC(50) value) of several pure pesticides (Diuron, Linuron, Dichlofluanid, Sea nine, Irgarol and tributyltin (TBT)) were measured and compared with the EC(50) value of the pesticide mixed with MTBE, using the Vibrio fischeri and Daphnia magna acute toxicity assays. The interaction between chemicals was evaluated in terms of the effects of mixing on the EC(50) value (i.e. the concentration (mg/L) of a compound or mixture that is required to produce a 50% change in a toxic response parameter) and the time required to generate the toxic response. Presence of MTBE enhanced the EC(50) value of several pesticides (Diuron, Dichlofluanid, TBT and Linuron) and/or the toxic response manifested more rapidly than with pure pesticides. Toxicity enhancements were quite substantial in many cases. For example, the presence of MTBE increased the toxicity of Diuron by more than 50% when tested with the V. fischeri assay (5, 15 and 30 min exposure). Also, the toxic response manifested itself within 5 min whereas without the MTBE the same response arose in 30 min. Presence of MTBE increased the toxicity of Dichlofluanid by 30% when measured with the D. magna assay. Toxicities of only two pesticides (Sea nine and Irgarol) were not raised by the presence of MTBE.
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Affiliation(s)
- M D Hernando
- Department of Analytical Chemistry, University of Almería, 04120 Almería, Spain
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Malato S, Cáceres J, Fernández-Alba AR, Piedra L, Hernando MD, Agüera A, Vial J. Photocatalytic treatment of diuron by solar photocatalysis: evaluation of main intermediates and toxicity. Environ Sci Technol 2003; 37:2516-2524. [PMID: 12831038 DOI: 10.1021/es0261170] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The technical feasibility, mechanisms, and performance of degradation of aqueous diuron (22 mg/L) have been studied at pilot scale in two well-defined photocatalytic systems of special interest because natural UV light can be used: heterogeneous photocatalysis with titanium dioxide and homogeneous photocatalysis by photo-Fenton. Equivalent pilot-scale (made up of Compound Parabolic Collectors (CPCs) specially designed for solar photocatalytic applications) and field conditions used for both allowed adequate comparison of the degree of mineralization and toxicity achieved as well as the transformation products generated en route to mineralization by both systems. Total disappearance of diuron is attained by both phototreatments in 45 min. 100% of chlorine was recovered as chloride, but total recovery of nitrogen as inorganic ions was not attained. 90% of mineralization was reached after 200 min of photocatalytic treatment, but toxicity measured by two different bioassays (Daphnia magna and a Microalga) was reduced to below the threshold (EC50%) in a shorter time. Transformation products evaluated by LC-IT-MS by direct injection of the samples were the same in both cases. The main differences between the two processes were in the amount of transformation products (DPs) generated, not in the DPs detected, which were always the same.
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Affiliation(s)
- S Malato
- Plataforma Solar de Almería-CIEMAT, Ctra. Senés Km. 4, 04200-Tabernas, Almería, Spain.
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Abstract
Different types of organic pollutants commonly detected in seawater have been evaluated by acute toxicity bioassays. Vibrio fischeri, Daphnia magna, and Selenastrum capricornotum were selected to test toxic effects of individual compounds and mixtures of these compounds, obtaining EC50 values in the range of 0.001 to 28.9 mg/l. In the case of mixtures, synergistic toxic responses were seen for a clear majority of the cases (>60%). Mixtures containing methyl-tertiary-butyl ether (MTBE) exhibit accelerated processes that result in a change in concentration required to produce a toxic effect; for example, in the case of mixtures containing MTBE and Diuron and Dichlofluanid.
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Affiliation(s)
- A R Fernández-Alba
- Pesticide Residue Research Group, Faculty of Sciences, University of Almería, 04120, Almería, Spain.
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Hernando MD, Piedra L, Belmonte A, Agüera A, Fernández-Alba AR. Determination of traces of five antifouling agents in water by gas chromatography with positive/negative chemical ionisation and tandem mass spectrometric detection. J Chromatogr A 2001; 938:103-11. [PMID: 11771828 DOI: 10.1016/s0021-9673(01)01201-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
A highly selective and sensitive gas chromatography-mass spectrometry methodology has been developed for the determination of five antifouling compounds, currently licensed for use in marine antifouling paints. The procedure uses an ion trap mass spectrometer provided with an external ion source that allows the combined use, in the same analysis, of positive (PCI) and negative (NCI) chemical ionisation and tandem mass spectrometric fragmentation (MS-MS). Ionisation and fragmentation processes were optimised individually for each compound, thus, permitting maximum sensitivity and selectivity to be obtained. A complete validation study, including those aspects that affect both correct quantification and unequivocal confirmation, demonstrated the good performance of the proposed method. Detection limits obtained were lower than 0.005 microg l(-1), except for Irgarol 1051 (0.050 microg l(-1)). The method was applied to real seawater samples from different
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Affiliation(s)
- M D Hernando
- Pesticide Residue Research Group, University of Almeria, Spain
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Martínez K, Ferrer I, Hernando MD, Fernández-Alba AR, Marcé RM, Borrull F, Barceló D. Occurrence of antifouling biocides in the Spanish Mediterranean marine environment. Environ Technol 2001; 22:543-552. [PMID: 11424731 DOI: 10.1080/09593332208618258] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A compilation of the results of a monitoring program of the recently used antifouling pesticides diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea), Irgarol 1051 (2-methylthio-4-tertiary-butylamino-6-cyclopropylamino-s-teiazine), seanine 211 (4,5-dichloro-2-n-octyl-4-isothazolin-3-one), chlorothalonil (2,4,5,6-tetrachloro-isophthalonitrile), dichlofluanid (N'-dimethyl-N-phenylsulphanamide), TCMTB ((2-thiocyanomethylthio) benzothiazole), and three degradation products demethyldiuron (3-(3,4-dichlorophenyl)-1-methylurea),3,4-dichlorophenylurea and 2-methylthio-4-tert-butylamino-s-triazine (Irgarol degradation product) that was carried out between April 1996 and February 2000 in enclosed seawaters from Catalonia and Almería (Spanish Mediterranean coast) is reported. Nine points were sampled along the Catalan coast: Barcelona Olympic port, Masnou, Blanes, Sant Carles de la Ràpita, Tarragona, Cambrils and Salou marinas as well as the Cambrils and Tarragona fishing harbors and in marinas and ports from Almeria: Aguadulce port, Almería port, Almerimar fishing harbour and Almerimar marina. The analytical methodologies were based on Solid Phase Extraction followed by liquid chromatography (LC) or gas chromatography (GC) coupled to a mass spectrometry (MS) or -Diode Array Detector. The main pollutants found in the sampled points were diuron and Irgarol 1051 that were detected at concentrations up to 2.19 micrograms l-1 and 0.33 microgram l-1, respectively. On the other hand, seanine 211 was found at the highest concentration (up to 3.7 micrograms l-1) during the summer of 1999. Low concentrations of dichlofluanid and the above mentioned degradation products were detected for the first time in the Spanish coasts. Chlorothalonil, TCMTB were not found at concentrations higher than 1 and 20 ng l-1 respectively which were the limit of determination (LOD) of the method for these compounds. In general the contamination at the different marinas is higher at the end of spring and in summer where the boating activity is also higher. This paper shows for the first time that the contamination by the new antifouling pesticides in Spanish coastline, basically marinas and fishing harbours, is permanent along the whole calendar year. So, preventive actions by the harbour authorities will be needed in the near future in order to monitor and control the levels and effects of the new antifouling biocides in the marine environment.
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Affiliation(s)
- K Martínez
- Department of Environmental Chemistry, IIQAB-CSIC, 08034 Barcelona, Spain
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Hernando MD, Agüera A, Fernández-Alba AR, Piedra L, Contreras M. Gas chromatographic determination of pesticides in vegetable samples by sequential positive and negative chemical ionization and tandem mass spectrometric fragmentation using an ion trap analyser. Analyst 2001; 126:46-51. [PMID: 11205511 DOI: 10.1039/b006933g] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A selective and sensitive chromatographic method is described for the determination of nine organochlorine and organophosphorus pesticides in vegetable samples by gas chromatography-mass spectrometry. The proposed method combines the use of positive and negative chemical ionisation and tandem mass spectrometric fragmentation, resulting in a significant increase in selectivity and allowing the simultaneous confirmation and quantification of trace levels of pesticides in complex vegetable matrices. Parameters relative to ionisation and fragmentation processes were optimised to obtain maximum sensitivity. Repeatability and reproducibility studies yielded relative standard deviations lower than 25% in all cases. Identification criteria, such as retention time and relative abundance of characteristic product ions, were also evaluated in order to guarantee the correct identification of the target compounds. The method was applied to real vegetable samples to demonstrate its use in routine analysis.
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Affiliation(s)
- M D Hernando
- Pesticide Residue Research Group, University of Almería, 04071 Almería, Spain
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Agüera A, Piedra L, Hernando MD, Fernández-Alba AR. Multiresidue method for the analysis of five antifouling agents in marine and coastal waters by gas chromatography-mass spectrometry with large-volume injection. J Chromatogr A 2000; 889:261-9. [PMID: 10985557 DOI: 10.1016/s0021-9673(00)00425-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A simple multiresidue method has been developed for the determination of five pesticides, commonly used as active ingredients in antifouling paints, in seawater samples. The pesticides studied were: chlorothalonil (2,4,5,6-tetrachloroisophthalonitrile), dichlofluanid (N-dimethyl-N-phenylsulphamide), Sea-Nine 211 (4,5-dichloro-2-n-octyl-4-isothazolin-3-one), Irgarol 1051 (2-methylthio-4-tert.-butylamino-6-cyclopropylamino-s-triazine) and TCMTB (2-thiocyanomethylthiobenzothiazole). The analytes were extracted from 200 ml water samples, using solid-phase extraction. A copolymer with hydrophilic-lipophilic balance was used as sorbent yielding good recoveries (82-95%) for most compounds except dichlofluanid and Sea-Nine 211 (<60%). Large volume injection (10 microl) gas chromatography and electron impact ionization MS (selected ion monitoring mode) detection enabled these compounds to be identified and quantified at the 1.2-3.0 ng/l level. Analysis of samples performed in three marinas in Almería (Spain) revealed the presence of Irgarol 1051 in all the cases, at concentration levels between 25 and 450 ng/l.
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Affiliation(s)
- A Agüera
- Pesticide Residue Research Group, University of Almería, Spain
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Agüera A, Piedra L, Hernando MD, Fernández-Alba AR, Contreras M. Splitless large-volume GC-MS injection for the analysis of organophosphorus and organochlorine pesticides in vegetables using a miniaturised ethyl acetate extraction. Analyst 2000; 125:1397-402. [PMID: 11002922 DOI: 10.1039/b002611p] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple, rapid and sensitive multiresidue method has been developed for the determination of ten organophosphorus and organochlorine pesticides, commonly used in crop protection. The analysis uses a miniaturised extraction with ethyl acetate followed by large volume injection (10 microL) GC-EI-MS analysis in SIM (selective ion monitoring) mode. Sensitivity and selectivity of the method were acceptable with limits of detection (LODs) lower than 0.01 mg kg-1, except for endosulfan alpha and beta (0.05 mg kg-1). Average recoveries of between 63-99% were obtained and good linearity was observed in the range from 0.01 to 1.00 mg kg-1. Repeatability and reproducibility studies yielded relative standard deviations lower than 20% in all the cases. The method was applied to the analysis of 110 tomato, pepper and cucumber samples, as part of the monitoring programme of the Association of Producers and Exporters of Fruits and Vegetables of Almería.
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Affiliation(s)
- A Agüera
- Pesticide Residue Research Group, University of Almería, Spain.
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