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Oflu S, Erarpat S, Zaman BT, Eroğlu K, Günkara ÖT, Bakırdere S, Turak F. Quantification of trace fenuron in waste water samples by matrix matching calibration strategy and gas chromatography-mass spectrometry after simultaneous derivatization and preconcentration. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1063. [PMID: 37594584 DOI: 10.1007/s10661-023-11575-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 06/30/2023] [Indexed: 08/19/2023]
Abstract
This study presents a highly sensitive and accurate analytical strategy for the determination of fenuron in wastewater samples using gas chromatography-mass spectrometry (GC-MS). Simultaneous derivatization and spray-based fine droplet formation-liquid phase microextraction (SFDF-LPME) method was developed and performed to achieve low detection limits. The parameters of the derivatization and SFDF-LPME method were optimized by univariate approach to improve sensitivity and selectivity. Under the optimum SFDF-LPME-GC-MS conditions, the limit of detection (LOD) and limit of quantitation (LOQ) were found to be 0.15 and 0.49 mg/kg, respectively. In addition, the linear range was calculated as 0.51-24.50 mg/kg. Recovery studies were carried out on wastewater samples to determine the accuracy of the developed method and its applicability to real sample matrix. Matrix matching calibration strategy was applied to eliminate/reduce any possible interference effects caused by the complexity of the wastewater matrix and to increase the accuracy of the analytical results. Percent recovery results varied between 85.9 and 120.9% with small percent relative standard deviation values. These results were satisfactory in terms of the accuracy and applicability of the proposed method for wastewater samples.
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Affiliation(s)
- Sude Oflu
- Yıldız Technical University, Faculty of Art and Science, Department of Chemistry, 34210, Davutpasa, Esenler, Istanbul, Turkey
| | - Sezin Erarpat
- Yıldız Technical University, Faculty of Art and Science, Department of Chemistry, 34210, Davutpasa, Esenler, Istanbul, Turkey
| | - Buse Tuğba Zaman
- Yıldız Technical University, Faculty of Art and Science, Department of Chemistry, 34210, Davutpasa, Esenler, Istanbul, Turkey
| | - Kumsal Eroğlu
- Yıldız Technical University, Faculty of Art and Science, Department of Chemistry, 34210, Davutpasa, Esenler, Istanbul, Turkey
| | - Ömer Tahir Günkara
- Yıldız Technical University, Faculty of Art and Science, Department of Chemistry, 34210, Davutpasa, Esenler, Istanbul, Turkey
| | - Sezgin Bakırdere
- Yıldız Technical University, Faculty of Art and Science, Department of Chemistry, 34210, Davutpasa, Esenler, Istanbul, Turkey.
- Turkish Academy of Sciences (TÜBA), Vedat Dalokay Street, No: 112, 06670, Çankaya, 06690, Ankara, Turkey.
| | - Fatma Turak
- Yıldız Technical University, Faculty of Art and Science, Department of Chemistry, 34210, Davutpasa, Esenler, Istanbul, Turkey.
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Ngere J, Ebrahimi KH, Williams R, Pires E, Walsby-Tickle J, McCullagh JSO. Ion-Exchange Chromatography Coupled to Mass Spectrometry in Life Science, Environmental, and Medical Research. Anal Chem 2023; 95:152-166. [PMID: 36625129 PMCID: PMC9835059 DOI: 10.1021/acs.analchem.2c04298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Judith
B. Ngere
- Department
of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K.
| | - Kourosh H. Ebrahimi
- Institute
of Pharmaceutical Science, King’s
College London, London SE1 9NH, U.K.
| | - Rachel Williams
- Department
of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K.
| | - Elisabete Pires
- Department
of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K.
| | - John Walsby-Tickle
- Department
of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K.
| | - James S. O. McCullagh
- Department
of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K.,
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3
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Miniaturized QuEChERS extraction method for the detection of multi-residue pesticides in bat muscle tissue. Sci Rep 2022; 12:7164. [PMID: 35505235 PMCID: PMC9065137 DOI: 10.1038/s41598-022-11352-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 04/22/2022] [Indexed: 11/29/2022] Open
Abstract
Habitat loss and fragmentation are among the greatest threats to biodiversity and ecosystem stability, with physiological implications on wild fauna. Bats (Microchiroptera) are small mammals with a wide variety of eating habits, and the well-being of these animals is disturbed by exposure to pesticides. This study aimed to develop a miniaturized QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) extraction method for the detection of multi-residue pesticides in bat muscle tissue using gas chromatography coupled with mass spectrometry (GC–MS). A total of 48 pesticides were tested in 250 mg of bat muscle tissue. The developed analytical method was applied to 148 bats collected from two different areas in Minas Gerais State, Southeast Region of Brazil. The method presented good sensitivity and allowed the determination of residues of 48 pesticides in bat muscle using GC–MS. The miniaturized extraction method makes the analysis feasible even when the sample volume is limited. However, no pesticide residues were detected in bats from the two areas investigated.
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Microalgae-Based Fluorimetric Bioassays for Studying Interferences on Photosynthesis Induced by Environmentally Relevant Concentrations of the Herbicide Diuron. BIOSENSORS 2022; 12:bios12020067. [PMID: 35200329 PMCID: PMC8869104 DOI: 10.3390/bios12020067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 01/15/2022] [Accepted: 01/19/2022] [Indexed: 11/28/2022]
Abstract
The widespread agricultural use of the phenylurea herbicide Diuron (DCMU) requires the investigation of ecotoxicological risk in freshwater and soil ecosystems in light of potential effects on non-target primary producers and a heavier effect on higher trophic levels. We used microalgae-based fluorimetric bioassays for studying the interferences on the photosynthesis of a freshwater and soil model green microalga (Chlamydomonas reinhardtii) induced by environmentally relevant concentrations of the herbicide DCMU. Measurements of steady-state chlorophyll a (Chl-a) fluorescence emission spectra were performed; as well, the kinetics of the Chl-a fluorescence transient were recorded. Percentage indexes of interference on photosynthesis were calculated after comparison of steady-state and kinetic Chl-a fluorescence measurements of DCMU-exposed and control C. reinhardtii cell suspensions. The results obtained after 30 min exposure to the herbicide DCMU confirmed a significant inhibitory effect of DCMU 2 μg/L, and no significant differences between %ι values for DCMU 0.2 μg/L and 0.02 μg/L exposures. Positive %ε values from kinetic measurements of the Chl-a fluorescence transient confirmed the same interfering effect of 2 μg/L DCMU on PSII photochemistry in the exposed C. reinhardtii cell suspensions. Negative values of %ε observed for 0.2 and 0.02 μg/L DCMU exposures could be attributable to a presumptive ‘stimulatory-like’ effect in the photochemistry of photosynthesis. Short-term exposure to sub-μg/L DCMU concentration (≤0.2 μg/L) affects the photosynthetic process of the model microalga C. reinhardtii. Similar environmental exposures could affect natural communities of unicellular autotrophs, with hardly predictable cascading secondary effects on higher trophic levels.
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Luo R, Shen B, Xiang P, Liu W. Determination of twenty herbicides in blood by ultrapressure liquid chromatography-tandem mass spectrometry. Forensic Sci Int 2021; 327:110910. [PMID: 34425306 DOI: 10.1016/j.forsciint.2021.110910] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 07/10/2021] [Accepted: 07/14/2021] [Indexed: 11/29/2022]
Abstract
A sensitive and rapid method for the simultaneous determination of twenty herbicides (aclonifen, lactofen, terbutryn, butylate, carbetamide, fluazifop-P-butyl, propanil, prometryn, isoproturon, terbumeton, pretilachlor, pendimethalin, cycloxydim, tri-allate, metolachlor, diuron, alloxydim, prosulfuron, triflusulfuron-methyl, and acetochlor) in human blood is reported herein. Liquid-liquid extraction coupled with ultra-pressure liquid chromatography-tandem mass spectrometry was employed for the simultaneous analysis of all compounds in 15 min. Validation parameters were studied through the estimation of the limits of detection and quantification, calibration curves, sensitivity, spiked recovery and precision. The limits of detection ranged from 0.1 to 1.0 ng/mL. The limits of quantification ranged from 0.5 to 2.0 ng/mL. Good linearity was obtained for all compounds with R2> 0.99 in all cases. Furthermore, interday precision (< 15%) and intraday precision (< 15%) were shown to be satisfactory. Recoveries in spiked blood samples were evaluated, and acceptable values (88.0%~108.8%) were found. Finally, this method was successfully applied to the determination of fluazifop-P-butyl, isoproturon and acetochlor in blood samples from real forensic cases. These results suggest that this method is reliable for rapid forensic and clinical diagnosis.
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Affiliation(s)
- Ruxin Luo
- Shanghai Key Laboratory of Forensic Science, Shanghai Forensic Platform, Department of Forensic Toxicology, Academy of Forensic Science, Shanghai, China
| | - Baohua Shen
- Shanghai Key Laboratory of Forensic Science, Shanghai Forensic Platform, Department of Forensic Toxicology, Academy of Forensic Science, Shanghai, China
| | - Ping Xiang
- Shanghai Key Laboratory of Forensic Science, Shanghai Forensic Platform, Department of Forensic Toxicology, Academy of Forensic Science, Shanghai, China.
| | - Wei Liu
- Shanghai Key Laboratory of Forensic Science, Shanghai Forensic Platform, Department of Forensic Toxicology, Academy of Forensic Science, Shanghai, China.
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Muhammad M, Rasul Jan M, Shah J, Ara B. Determination of Isoproturon in Environmental Samples using the QuEChERS Extraction-Spectrofluorimetric Method. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2019; 38:2614-2620. [PMID: 31499576 DOI: 10.1002/etc.4589] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 08/12/2019] [Accepted: 09/01/2019] [Indexed: 06/10/2023]
Abstract
An accurate and sensitive method has been developed for determination of the herbicide isoproturon using the Quick Easy Cheap Effective Rugged Safe (QuEChERS) extraction-spectrofluorimetric technique. The method involves the reaction of 2-cyanoacetamide with isoproturon in basic medium (NH3 ; 15 mol/L). The resulting fluorescent product was found to show maximum emission at 378 nm and maximum excitation at 333 nm. Fluorescence intensity under the influence of different parameters was investigated. The linear range of analyte concentrations was found to be 0.5 to 15 µg/mL, with a limit of detection of 0.144 µg/mL, a limit of quantification of 0.437 µg/mL (signal to noise ratio = 3), and a regression coefficient of 0.9991, under optimized conditions. The proposed method was effectively applied for determination of isoproturon in different matrices; the percentage of recovery varied from 85.00 ± 1.2% to 96.00 ± 0.5%. The method was also applied for residue analysis of isoproturon in real soil samples collected from a pilot field. For extraction of isoproturon, the QuEChERS extraction approach was used, and the average residue in the soil samples was found to be 0.81 ± 0.07 µg/g. To show the potential of this approach, our results were compared with those of other methods reported in the literature. Environ Toxicol Chem 2019;38:2614-2620. © 2019 SETAC.
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Affiliation(s)
- Mian Muhammad
- Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, Pakistan
- Department of Chemistry, University of Malakand, Khyber Pakhtunkhwa, Pakistan
| | - Muhammad Rasul Jan
- Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - Jasmin Shah
- Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - Behisht Ara
- Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, Pakistan
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Chen B, Wang X. Combined Approach for Determining Diuron in Sugarcane and Soil: Ultrasound-Assisted Extraction, Carbon Nanotube-Mediated Purification, and Gas Chromatography-Electron Capture Detection. J Food Sci 2019; 84:2402-2411. [PMID: 31429486 DOI: 10.1111/1750-3841.14752] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 05/18/2019] [Accepted: 07/15/2019] [Indexed: 11/28/2022]
Abstract
Diuron is a urea herbicide that is frequently detected in surface water, groundwater, and marine waters. However, there are few methods or guidelines reported on ensuring the quality of sugarcane and soil. In this study, a method was developed for detecting diuron to ensure the quality and safety of food and sugar. Mass spectrometry was used to identify 3,4-dichloroaniline as a marker for the thermal decomposition of diuron, and thus, as a representative component for quantitative diuron analysis. This approach can be used to rapidly detect trace amounts of diuron. In addition, ultrasound-assisted extraction (UAE) and carbon nanotube column purification were used in conjunction with gas chromatography-electron capture detection to detect diuron. The method was then evaluated for its accuracy, detection limit, and viability. The effects of extraction solvent, ultrasound time, and ultrasound power on the extraction efficiency of the analyte from sugarcane and soil were also investigated. The efficiency and optimum conditions of UAE were examined through single-factor experiments and Box-Behnken design (BBD). The optimal extraction conditions were identified as follows: acetonitrile as the extraction solvent, extraction temperature of 27 °C, extraction time of 3.4 min, and ultrasound power of 70 W. Under these conditions, high linearity was achieved for diuron concentrations of 0.01 to 5.0 mg/L, and the purification correlation coefficient was consistently greater than 0.998. Hence, gas chromatography, combined with UAE and BBD, offers superior efficiency extraction, which is sufficiently accurate and precise for pesticide residue analysis. PRACTICAL APPLICATION: We developed an accurate and cost-effective method for detecting diuron (a commonly used herbicide) in soil and sugar samples. We performed experiments to determine the optimum detection conditions for our method. This method can be used for online monitoring of sugar manufacturing processes to ensure food safety and quality.
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Affiliation(s)
- Bi Chen
- College of Food and Biochemical Engineering, Guangxi Science and Technology Normal Univ., Laibin, Guangxi, 546199, China
| | - Xiaoming Wang
- College of Food and Biochemical Engineering, Guangxi Science and Technology Normal Univ., Laibin, Guangxi, 546199, China
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Diaw PA, Mbaye OM, Thiaré DD, Oturan N, Gaye‐Seye MD, Coly A, Le Jeune B, Giamarchi P, Oturan MA, Aaron J. Combination of photoinduced fluorescence and GC–MS for elucidating the photodegradation mechanisms of diflubenzuron and fenuron pesticides. LUMINESCENCE 2019; 34:465-471. [DOI: 10.1002/bio.3612] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Revised: 01/03/2019] [Accepted: 01/11/2019] [Indexed: 11/12/2022]
Affiliation(s)
- Pape A. Diaw
- Laboratoire MatériauxElectrochimie et Photochimie Analytique ‐ Université Alioune Diop Bambey Sénégal
- Laboratoire de Photochimie et d'AnalyseUniversité Cheikh. Anta Diop Dakar Sénégal
| | - Olivier M.A. Mbaye
- Laboratoire de Photochimie et d'AnalyseUniversité Cheikh. Anta Diop Dakar Sénégal
| | - Diene D. Thiaré
- Laboratoire de Photochimie et d'AnalyseUniversité Cheikh. Anta Diop Dakar Sénégal
| | - Nihal Oturan
- Laboratoire Géomatériaux et Environnement (LGE)Université Paris‐Est Marne‐la‐Vallée 5 boulevard Descartes, Champs‐sur‐Marne Marne‐la‐Vallée Cedex 2 France
| | - Mame Diabou Gaye‐Seye
- Laboratoire de Photochimie et d'AnalyseUniversité Cheikh. Anta Diop Dakar Sénégal
- Laboratoire Géomatériaux et Environnement (LGE)Université Paris‐Est Marne‐la‐Vallée 5 boulevard Descartes, Champs‐sur‐Marne Marne‐la‐Vallée Cedex 2 France
| | - Atanasse Coly
- Laboratoire de Photochimie et d'AnalyseUniversité Cheikh. Anta Diop Dakar Sénégal
| | - Bernard Le Jeune
- Laboratoire OPTIMAG, EA 938, Faculté des SciencesUniversité de Brest 6 Avenue Victor le Gorgeu Brest Cedex France
| | - Philippe Giamarchi
- Laboratoire OPTIMAG, EA 938, Faculté des SciencesUniversité de Brest 6 Avenue Victor le Gorgeu Brest Cedex France
| | - Mehmet A. Oturan
- Laboratoire Géomatériaux et Environnement (LGE)Université Paris‐Est Marne‐la‐Vallée 5 boulevard Descartes, Champs‐sur‐Marne Marne‐la‐Vallée Cedex 2 France
| | - Jean‐Jacques Aaron
- Laboratoire Géomatériaux et Environnement (LGE)Université Paris‐Est Marne‐la‐Vallée 5 boulevard Descartes, Champs‐sur‐Marne Marne‐la‐Vallée Cedex 2 France
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Su M, Jia L, Wu X, Sun H. Residue investigation of some phenylureas and tebuthiuron herbicides in vegetables by ultra-performance liquid chromatography coupled with integrated selective accelerated solvent extraction-clean up in situ. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:4845-4853. [PMID: 29574757 DOI: 10.1002/jsfa.9014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 11/10/2017] [Accepted: 03/14/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Some trace amounts of urea herbicide residues can be transferred to humans via the food chain, thereby being potentially harmful to human health. The development of a robust analytical methodology for effective sample preparation and simultaneous determination of herbicide residues in vegetable samples is required for achieving food safety. RESULTS The diuron-molecularly imprinted polymers (MIPs) synthesized have excellent affinity and high selectivity to phenylureas (monolinuron, isoproturon, diuron and linuron) and tebuthiuron. A novel automated procedure with better selectivity for vegetable sample treatment was developed by integrated matrix solid-phase dispersion-accelerated solvent extraction clean-up in situ. Five herbicides can be baseline separated with runtime down to 5 min by ultra-performance liquid chromatography, and good linearity was obtained with a correlation coefficient (r) of 0.9999. The limit of quantification of the method was in the range of 0.8-2.3 µg kg-1 . Diuron residue in cherry tomato sample was found to be 40 µg kg-1 . CONCLUSION The developed method has satisfactory selectivity, good linearity, high sensitivity and accuracy as well as speediness, and can ensure rapid selective extraction and sensitive multi-residue analysis at low microgram per kilogram levels of the herbicides in vegetable food. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Ming Su
- College of Chemistry and Environmental Science, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding, China
| | - Licong Jia
- College of Chemistry and Environmental Science, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding, China
- Hebei Medical University, Shijiazhuang, China
| | - Xingqiang Wu
- College of Chemistry and Environmental Science, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding, China
| | - Hanwen Sun
- College of Chemistry and Environmental Science, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding, China
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Wang J, Li M, Jiao C, Song Y, Wang C, Wu Q, Wang Z. Preparation of a magnetic porous organic polymer for the efficient extraction of phenylurea herbicides. J Chromatogr A 2017; 1519:19-27. [DOI: 10.1016/j.chroma.2017.09.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 08/30/2017] [Accepted: 09/01/2017] [Indexed: 12/31/2022]
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Diaw PA, Oturan N, Seye MDG, Coly A, Tine A, Aaron JJ, Oturan MA. Oxidative degradation and mineralization of the phenylurea herbicide fluometuron in aqueous media by the electro-Fenton process. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.06.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Li M, Wang J, Jiao C, Wang C, Wu Q, Wang Z. Graphene oxide framework: An adsorbent for solid phase extraction of phenylurea herbicides from water and celery samples. J Chromatogr A 2016; 1469:17-24. [DOI: 10.1016/j.chroma.2016.09.056] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 09/23/2016] [Accepted: 09/23/2016] [Indexed: 12/25/2022]
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Yang H, Deng J, Liu H, Yan W, Yang L, Yi B. Kinetics and mechanism of photocatalytic degradation of metobromuron by TiO2 in simulated sunlight. RESEARCH ON CHEMICAL INTERMEDIATES 2012. [DOI: 10.1007/s11164-012-0957-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zhang J, Liang Z, Li S, Li Y, Peng B, Zhou W, Gao H. In-situ metathesis reaction combined with ultrasound-assisted ionic liquid dispersive liquid–liquid microextraction method for the determination of phenylurea pesticides in water samples. Talanta 2012; 98:145-51. [DOI: 10.1016/j.talanta.2012.06.062] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2012] [Revised: 06/21/2012] [Accepted: 06/24/2012] [Indexed: 10/28/2022]
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15
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Monicka JC, James C. Theoretical and experimental vibrational study of the phenyl urea herbicide 1-(4-bromo-3-chlorophenyl)-3-methoxy-3-methylurea. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 94:30-35. [PMID: 22516114 DOI: 10.1016/j.saa.2012.03.069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2012] [Revised: 03/08/2012] [Accepted: 03/22/2012] [Indexed: 05/31/2023]
Abstract
FT-Raman and IR spectra of the herbicidal compound chlorbromuron have been recorded and analyzed. The detailed interpretation of the vibrational spectra has been carried out with the aid of normal coordinate analysis (NCA) following the scaled quantum mechanical force field methodology. The various intramolecular interactions which are responsible for the stabilization of the molecule were revealed by natural bond orbital analysis. The Mulliken population analysis on atomic charges and the HOMO-LUMO energy were also calculated. The presence of strong NH⋯O intermolecular hydrogen bonding was clearly exposed from the IR spectrum by the red shifting of NH stretching wavenumber.
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Affiliation(s)
- J Clemy Monicka
- Department of Physics and Research Centre, Scott Christian College (Autonomous), Nagercoil 629003, Tamil Nadu, India
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Determination of phenylureas herbicides in food stuffs based on matrix solid-phase dispersion extraction and capillary electrophoresis with electrochemiluminescence detection. J Chromatogr A 2011; 1218:9115-9. [DOI: 10.1016/j.chroma.2011.10.048] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Revised: 10/17/2011] [Accepted: 10/19/2011] [Indexed: 11/23/2022]
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17
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Raeppel C, Nief M, Fabritius M, Racault L, Appenzeller BM, Millet M. Simultaneous analysis of pesticides from different chemical classes by using a derivatisation step and gas chromatography–mass spectrometry. J Chromatogr A 2011; 1218:8123-9. [DOI: 10.1016/j.chroma.2011.08.098] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Revised: 08/26/2011] [Accepted: 08/31/2011] [Indexed: 10/17/2022]
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18
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Yuan M, Liu B, Liu E, Sheng W, Zhang Y, Crossan A, Kennedy I, Wang S. Immunoassay for phenylurea herbicides: application of molecular modeling and quantitative structure-activity relationship analysis on an antigen-antibody interaction study. Anal Chem 2011; 83:4767-74. [PMID: 21539295 DOI: 10.1021/ac200227v] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An indirect competitive enzyme-linked immunosorbent assay (icELISA) for 12 phenylurea herbicides (PUHs) was established with the half-maximum inhibition concentration (IC(50)) of 1.7-920.7 μg L(-1). A method of computer-aided molecular modeling was established in quantitative structure-activity relationship (QSAR) studies to obtain a deeper insight into the PUHs' antibody interactions on how and which molecular properties of the analytes quantitatively affect the antibody recognition. A two-dimensional (2D)-QSAR model based on the Hansch equation and a hologram QSAR (HQSAR) model were constructed, and both showed highly predictive abilities with cross-validation q(2) values of 0.820 and 0.752, respectively. It was revealed that the most important impact factor of the antibody recognition was the PUHs' hydrophobicity (log P), which provided a quadratic correlation to the antibody recognition. Hapten-carrier linking groups were less exposed to antibodies during immunization; thus, groups of the analytes in the same position were generally considered to be less contributive to antibody recognition during immunoassay. But the results of substructure-level analysis showed that these groups played an important role in the antigen-antibody interaction. In addition, the frontier-orbital energy parameter E(LUMO) was also demonstrated as a related determinant for this reaction. In short, the result demonstrated that the hydrophobicity and the lowest unoccupied molecular orbital energy (E(LUMO)) of PUH molecules were mainly responsible for antibody recognition.
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Affiliation(s)
- Meng Yuan
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
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Wang Y, Cai C, Xiao L, Wu Q, Cheng G. Determination of Phenylureas Herbicides in Foodstuffs Based on Matrix Solid-Phase Dispersion Extraction and RP-LC with UV Detection. Chromatographia 2011. [DOI: 10.1007/s10337-010-1870-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Design of experiments and detailed uncertainty analysis to develop and validate a solid-phase microextraction/gas chromatography–mass spectrometry method for the simultaneous analysis of 16 pesticides in water. J Chromatogr A 2010; 1217:5317-27. [DOI: 10.1016/j.chroma.2010.06.042] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Revised: 06/14/2010] [Accepted: 06/15/2010] [Indexed: 11/23/2022]
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21
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Wang Y, You J, Bao C, Zhang H, Yu A, Yu Y. Determination of Triazines by Ultrasonic-Assisted Ionic Liquid Microextraction Coupled with High Performance Liquid Chromatography. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.201090147] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Application of the Doehlert Design to Optimize the Signal Obtained in Photochemically Induced Fluorescence for the Determination of Eight Phenylureas. J Fluoresc 2007; 18:365-73. [DOI: 10.1007/s10895-007-0276-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2007] [Accepted: 10/16/2007] [Indexed: 10/22/2022]
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23
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Matamoros V, Puigagut J, García J, Bayona JM. Behavior of selected priority organic pollutants in horizontal subsurface flow constructed wetlands: a preliminary screening. CHEMOSPHERE 2007; 69:1374-80. [PMID: 17590410 DOI: 10.1016/j.chemosphere.2007.05.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2007] [Revised: 05/04/2007] [Accepted: 05/08/2007] [Indexed: 05/16/2023]
Abstract
A discrete injection experiment was carried out in a constructed wetland to evaluate the behavior of selected priority pollutants. A horizontal subsurface flow pilot plant located in the NE of Spain was selected for this study. A total of eight European Priority Pollutants listed in the Water Framework Directive were considered, including a commonly used herbicide (mecoprop). The pollutants encompassed a variety of chemical classes and physicochemical properties. They included organochlorine, organophosphorus, phenols, chloroacetanilides, triazine, phenoxycarboxylic acid and phenylurea pesticides. A time series of composite effluent samples and discrete gravel bed samples from the wetland were analyzed. Response curves for all the pollutants injected from effluent concentrations were obtained and compared with the tracer (clofibric acid). On the basis of an analysis of the samples taken 21 days after the injection, priority pollutants were classified into four groups according to their removal efficiency. These groups were (i) the highly efficiently removed (>90%), namely lindane, pentachlorophenol, endosulfan and pentachlorobenzene; (ii) the efficiently removed (80-90%), namely alachlor and chlorpyriphos; (iii) poorly removed (20%), namely mecoprop and simazine; and (iv) recalcitrant to elimination, namely clofibric acid and diuron. Taking into account the poor accumulation of the injected contaminants in the gravel bed (0-20%), biodegradation and plant uptake are postulated as the most likely elimination pathways for the pollutants.
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Affiliation(s)
- Víctor Matamoros
- Department of Environmental Chemistry, IIQAB-CSIC, Jordi Girona 18-26, E-08034 Barcelona, Spain
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24
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Sá F, López Malo D, Martínez Calatayud J. Determination of the Herbicide Fluometuron by Photo‐induced Chemiluminescence in a Continuous‐flow Multicommutation Assembly. ANAL LETT 2007. [DOI: 10.1080/00032710701603900] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Cydzik I, Albert-García JR, Calatayud JM. Photo-induced Fluorescence of Fluometuron in a Continuous-flow Multicommutation Assembly. J Fluoresc 2006; 17:29-36. [PMID: 17165123 DOI: 10.1007/s10895-006-0147-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2006] [Accepted: 10/13/2006] [Indexed: 11/25/2022]
Abstract
This paper deals with the photo-induced fluorimetric determination of the herbicide Fluometuron with the aid of a continuous-flow assembly of the emergent and new methodology known as Multicommutation which was provided with an on-line photoreactor. Maximum fluorescence intensity was observed at basic pH solutions, 1x 10(-4) mol l(-1) NaOH, after 1.4 min of irradiation and being the maximum at lambda(exc) 247.0 nm and lambda(em) 325.0 nm. The influence of different experimental parameters either chemical (pH, surfactants presence, solvent polarity and temperature) or hydrodynamic (time of photo-degradation, size and number of different segments and flow-rate) was tested. The linear dynamic range was from 0.01 to 4.0 mg l(-1) of Fluometuron; the inter-day reproducibility (as R.S.D.) of the slope was 0.001% and 1.7% from the peaks intra-day reproducibility. A large series of potential interferents was studied and finally the method was applied to human urine, soil, formulation and water samples.
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Affiliation(s)
- I Cydzik
- Department of Analytical Chemistry, Universidad de Valencia, Valencia, Spain.
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26
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Medyantseva EP, Varlamova RM, Bikkenina DR, Budnikov GK. Preconcentration of Simazine from Aqueous Solutions with an Immunosorbent and Its Quantitative Determination. RUSS J APPL CHEM+ 2005. [DOI: 10.1007/s11167-005-0458-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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27
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Scheyer A, Morville S, Mirabel P, Millet M. A multiresidue method using ion-trap gas chromatography?tandem mass spectrometry with or without derivatisation with pentafluorobenzylbromide for the analysis of pesticides in the atmosphere. Anal Bioanal Chem 2005; 381:1226-33. [PMID: 15791484 DOI: 10.1007/s00216-005-3060-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2004] [Revised: 10/18/2004] [Accepted: 12/22/2004] [Indexed: 10/25/2022]
Abstract
A multiresidue method using gas chromatography coupled to ion-trap tandem mass spectrometry (MS/MS) was developed for the analysis of 27 pesticides, commonly used in Alsace, in atmospheric samples (particle and gas phases). As pesticides are expected to be present at very low concentrations and in a complex matrix, the analytical method used was both highly selective and sensitive. These two properties were obtained by associating chromatography with ion-trap MS/MS. To develop this method, analysis of electron impact in single MS was first conducted to choose the parent ions of the pesticides studied. Among the 27 pesticides analysed, seven of them require a derivatisation step. This was the case of some ureas (chlorotoluron, diuron and isoproturon), phenoxy acids (2,4-dichlorophenoxyacetic acid, 4-chloro-2-methylphenoxyacetic acid and mecoprop) and of bromoxynil. The derivatisation was performed with success with pentafluorobenzylbromide. Then, a MS/MS method was optimised by parameters such as the radio frequency storage level and the collision-induced dissociation excitation voltage. Finally, a last step enabled the development of two calibrating programs based on the quantification of daughter ions for the 20 pesticides analysed directly (run 1) and for the seven pesticides which needed derivatisation (run 2). With this analytical procedure, the detection limits varied between 2.5 and 1,250 pg m(-3) depending on the compounds studied. This method was tested with success for atmospheric samples collected in Strasbourg (France) during intensive pesticide treatment in 2002.
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Affiliation(s)
- Anne Scheyer
- Laboratoire de Physico-Chimie de l'Atmosphère, Centre de Géochimie de la Surface, Université Louis Pasteur, 1, rue Blessig, 67084, Strasbourg Cedex, France
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28
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Berrada H, Font G, Moltó JC. Application of solid-phase microextraction for determining phenylurea herbicides and their homologous anilines from vegetables. J Chromatogr A 2004; 1042:9-14. [PMID: 15296383 DOI: 10.1016/j.chroma.2004.05.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Residues of metobromuron, monolinuron and linuron herbicides and their aniline homologous were analyzed in carrots, onions and potatoes by solid-phase microextraction (SPME) performed with a polyacrylate fiber. A juice was obtained from food samples that were further diluted, and an aliquot was extracted after sodium chloride (14%) addition and pH control. At pH 4 only the phenylureas were extracted. A new extraction at pH 11 allowed the extraction of phenylureas plus homologous aniline metabolites. Determination was carried out by gas chromatography with nitrogen-phosporus detection (NPD) the identity of the determined compounds was studied by gas chromatography-mass spectrometry. Limits of quantification (LOQs) obtained with NPD and MS (selected-ion monitoring) were in the microg/kg order allowing determination of maximum residue levels (MRLs) established in the Spanish regulations. MRLs ranged from 0.02 to 0.1 mg/kg depending on the kind of food and herbicide. Under the proposed conditions matrix effects were low enough to permit calibration with samples proceeding from ecological (non-pesticide treated) crops. Twelve commercial samples of each carrots, onions and potatoes were analyzed and only three samples of potatoes contained residues of linuron at levels below MRLs.
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Affiliation(s)
- H Berrada
- Laboratori de Bromatologia i Toxicologia, Facultat de Farmàcia, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Spain
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Escuderos-Morenas ML, Santos-Delgado MJ, Rubio-Barroso S, Polo-Díez LM. Direct determination of monolinuron, linuron and chlorbromuron residues in potato samples by gas chromatography with nitrogen–phosphorus detection. J Chromatogr A 2003; 1011:143-53. [PMID: 14518771 DOI: 10.1016/s0021-9673(03)01139-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A gas chromatography with nitrogen-phosphorus detection direct method for methoxyurea herbicide determination in powdered potato and fresh potato samples has been developed. A previous study of the thermal stability of the phenylurea herbicides seems to confirm that the ones containing the methoxy radical, i.e. monolinuron, linuron and chlorbromuron, were stable. The herbicides were extracted from the sample through liquid-liquid extraction with dichloromethane-light petroleum (1:1), followed by solid-phase extraction in a C8 cartridge. The recoveries were in the range 84-95% for powdered potato and 86-101% for fresh potato. The RSD values were less than 10%, at 0.1 microg g(-1) concentration level (n = 4) for both types of samples. Detection limits of the method were 7.0-30 ng g(-1) for powdered potato and 6.0-50 ng g(-1) for fresh potato.
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Affiliation(s)
- M L Escuderos-Morenas
- Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, 28040 Madrid, Spain
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Arrebola F, Martı́nez Vidal J, Mateu-Sánchez M, Álvarez-Castellón F. Determination of 81 multiclass pesticides in fresh foodstuffs by a single injection analysis using gas chromatography–chemical ionization and electron ionization tandem mass spectrometry. Anal Chim Acta 2003. [DOI: 10.1016/s0003-2670(03)00332-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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