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Zeng Y, Zhang M, Ding L, Xie S, Liu P, Xie D, Wang S, Cheng F. Molecularly imprinted polymer photoelectrochemical sensor for the detection of triazophos in water based on carbon quantum dot-modified titanium dioxide. Mikrochim Acta 2024; 191:277. [PMID: 38647714 DOI: 10.1007/s00604-024-06364-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 04/12/2024] [Indexed: 04/25/2024]
Abstract
Widely used organophosphorus pesticide triazophos (TAP) can easily cumulate in aquatic system due to its high stability chemically and photochemically and thus posing significant threat to aquatic creatures and humans' health. Urging demand for rapid determining TAP in water has risen. Photoelectrochemical (PEC) sensing turns out to be a good candidate for its simplicity in fabrication and swiftness in detection. Nevertheless, traditional PEC sensors often lack selectivity as their signal generation primarily relies on the oxidation of organic compounds in the electrolyte by photo-induced holes. To address this limitation, molecularly imprinted polymers (MIPs) can be in combined with PEC sensors to significantly enhance the selectivity. Here, we present a novel approach utilizing a PEC sensor enhanced by carbon-modified titanium dioxide molecularly imprinted polymers (MIP/C/TiO2 NTs). Carbon quantum dot (CQD) modification of titanium dioxide nanotube arrays (C/TiO2 NTs) was achieved through a one-step anodization process, effectively enhancing visible light absorption by narrowing the band gap of TiO2, and CQDs also function as sensitizer accelerating charge transfer for improved and stable photocurrent signals during detection. Our method further incorporates MIPs to heighten the selectivity of the PEC sensor. Electro-polymerization using cyclic voltammetry was employed to polymerize MIPs with pyrrole as the functional monomer and triazophos as the target molecule. The resultant MIP/C/TiO2 NT sensor exhibited remarkable sensitivity, with a detection limit of 0.03 nM (S/N = 3), alongside exceptional selectivity and stability for triazophos detection in water. This offers a promising avenue for efficient, cost-effective, and rapid monitoring of pesticide contaminants in aquatic environments, contributing to the broader goals of environmental preservation and public health.
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Affiliation(s)
- Yinan Zeng
- Guangdong Engineering and Technology Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Min Zhang
- Guangdong Engineering and Technology Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China.
| | - Lei Ding
- Guangdong Engineering and Technology Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China
- School of Biomedical Engineering, Faculty of Engineering and IT, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Shilei Xie
- Guangdong Engineering and Technology Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Peng Liu
- Guangdong Engineering and Technology Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Dong Xie
- Guangdong Engineering and Technology Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Shoushan Wang
- Guangdong Engineering and Technology Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Faliang Cheng
- Guangdong Engineering and Technology Research Centre for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China.
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Theansun W, Sriprachuabwong C, Chuenchom L, Prajongtat P, Techasakul S, Tuantranont A, Dechtrirat D. Acetylcholinesterase modified inkjet-printed graphene/gold nanoparticle/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) hybrid electrode for ultrasensitive chlorpyrifos detection. Bioelectrochemistry 2023; 149:108305. [DOI: 10.1016/j.bioelechem.2022.108305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 10/06/2022] [Accepted: 10/11/2022] [Indexed: 12/05/2022]
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3
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Sun Z, Lu J, Zhang X, Shan X, Wu Q, Li C, Li H, Yang S, Tian L. Electrospun nanofibers containing CdTe@ZnNi-MOF for electrochemiluminescent determination of chlorpyrifos. Mikrochim Acta 2022; 189:473. [DOI: 10.1007/s00604-022-05574-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 11/09/2022] [Indexed: 11/27/2022]
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A novel cathodic electrochemiluminescent sensor based on CuS/carbon quantum dots/g-C3N4 nanosheets and boron nitride quantum dots for the sensitive detection of organophosphate pesticide. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107421] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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5
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Sheikhi ZN, Khajeh M, Oveisi AR, Bohlooli M. Functionalization of an iron-porphyrinic metal–organic framework with Bovine serum albumin for effective removal of organophosphate insecticides. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116974] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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6
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Alam S, Srivastava N, Iqbal N, Saini MK, Kumar J. Magnetic Solid-Phase Extraction (MSPE) Using Magnetite-Based Core-Shell Nanoparticles with Silica Network (SiO2) Coupled with GC-MS/MS Analysis for Determination of Multiclass Pesticides in Water. J AOAC Int 2021; 104:633-644. [PMID: 33201225 DOI: 10.1093/jaoacint/qsaa156] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 09/16/2020] [Accepted: 10/20/2020] [Indexed: 11/12/2022]
Abstract
BACKGROUND For the analysis of pesticide residues in water samples, various extraction techniques are available. However, liquid-liquid extraction (LLE) and solid-phase extraction (SPE) are most commonly used. LLE and SPE extraction techniques each have their own disadvantages. OBJECTIVE The aim of the study was to develop an environment-friendly multi-residue method for determination of multiclass pesticides in environmental water samples (ground water, agricultural field/irrigation run-off water, etc.). METHODS The magnetic solid-phase extraction (MSPE) technique using surface-fabricated magnetic nano-particles was used for extraction of water samples, followed by quantification by gas chromatography tandem mass spectrometry. The developed multi-residue method was validated in terms of linearity, LOD, LOQ, recovery, and repeatability. RESULTS Recovery data were obtained at the spiking concentration level of 1, 5, and 10 µg/L, yielding recoveries in the range of 70-120%. Overall, non-polar pesticides from all the groups, i.e., synthetic pyrethroid, organophosphorus, organochlorine, herbicides, and fungicides, show acceptable recovery percentages. Good linearity (r2 value ≥ 0.99) was observed at the concentration range of 0.5-100 µg/L. RSD values were found ≤ 18.8. CONCLUSIONS The study shows that the method is specific, rapid, and low cost, as well as having a good linearity and recovery; thus, this method is applied in routine purposes for the analysis of pesticide residue in real water samples. HIGHLIGHTS Due to better adsorption ability, permeability, and magnetic separability, the functionalized nano-particles were found effective in the enrichment of 22 multiclass pesticides including organo-phosphorus, organo-chlorine, synthetic pyrethroid, herbicides, and fungicides.
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Affiliation(s)
- Samsul Alam
- Analytical Division, Institute of Pesticide Formulation Technology (IPFT), Sector-20, Udyog Vihar, Gurgaon, Haryana, India
| | - Neha Srivastava
- Analytical Division, Institute of Pesticide Formulation Technology (IPFT), Sector-20, Udyog Vihar, Gurgaon, Haryana, India
| | - Nusrat Iqbal
- Analytical Division, Institute of Pesticide Formulation Technology (IPFT), Sector-20, Udyog Vihar, Gurgaon, Haryana, India
| | - Mahesh Kumar Saini
- Analytical Division, Institute of Pesticide Formulation Technology (IPFT), Sector-20, Udyog Vihar, Gurgaon, Haryana, India
| | - Jitendra Kumar
- Analytical Division, Institute of Pesticide Formulation Technology (IPFT), Sector-20, Udyog Vihar, Gurgaon, Haryana, India
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Ramezani AM, Yamini Y, Nazraz M. Development of a convenient polypyrrole based sorbent for headspace solid phase microextraction of diazinon and chlorpyrifos. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2021.103806] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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8
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Khademi SMS, Salemi A, Jochmann M, Joksimoski S, Telgheder U. Development and comparison of direct immersion solid phase micro extraction Arrow-GC-MS for the determination of selected pesticides in water. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106006] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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9
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Kamyabi MA, Moharramnezhad M. An ultra-sensitive electrochemiluminescence probe based on ternary nanocomposite and boron nitride quantum dots for detection of diazinon. Mikrochim Acta 2021; 188:93. [PMID: 33609187 DOI: 10.1007/s00604-021-04732-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 01/25/2021] [Indexed: 11/30/2022]
Abstract
A new enzyme-free electrochemiluminescence (ECL) pesticide sensor was fabricated based on ternary nanocomposite of ruthenium nanoparticles/silver nanoparticles/graphene oxide on the surface of glassy carbon electrode for ultratrace determination of diazinon. Due to some drawbacks of enzyme-based sensors such as enzyme instability at elevated temperature, humidity, changes of pH, and high price of the enzyme, the use of enzyme was omitted in the construction of the developed sensor. The silver nanoparticles with good electrocatalytic proficiency as a signal improving agent and tris(2,2bipyridine) ruthenium(II) as a popular luminophore were uniformly deposited on the surface of the prepared graphene oxide/GC electrode at nanoscale. Boron nitride quantum dots as an efficient co-reactant created the superior efficiency in amplifying the ECL intensity of the ruthenium-based ECL system. The prepared electrode was utilized for the detection of diazinon via the robust ECL method. For the present sensor, a wide linear dynamic range and low detection limit were achieved (3.0 × 10-15 to 6.5 × 10-9 M and 9.5 × 10-16 M, respectively). The obtained results confirmed the fabrication of the robust ECL probe, which is characterized by the cooperative effect of silver nanoparticles and the attached luminophore species. The main advantage of the presented sensor was that the samples could be diluted so that the effect of the interference species was negligible. Due to excellent properties toward accurate determination of diazinon, the ECL sensor as a new practical platform was applied for quantitative detection of diazinon in some real samples.
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Affiliation(s)
- Mohammad Ali Kamyabi
- Electroanalytical Chemistry Laboratory, Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, 45371-38791, Iran.
| | - Mohsen Moharramnezhad
- Electroanalytical Chemistry Laboratory, Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, 45371-38791, Iran
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Jõul P, Vaher M, Kuhtinskaja M. Carbon aerogel-based solid-phase microextraction coating for the analysis of organophosphorus pesticides. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:69-76. [PMID: 33290461 DOI: 10.1039/d0ay02002h] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The current study is focused on the in situ synthesis of a carbon aerogel (CA)-based solid-phase microextraction (SPME) fiber coating on stainless steel wire and evaluation of the suitability of CAs as SPME coating materials for the analysis of selected organophosphorus pesticides (OPPs) contained in environmental samples. A CA-based coating was obtained by pyrolyzing organic aerogels, which were prepared by the sol-gel polymerization of formaldehyde and 5-methylresorcinol, an oil shale processing by-product. The results demonstrated, for the first time, the in situ synthesis of a CA-based SPME fiber coating on stainless steel wire and its suitability for the extraction and preconcentration of six OPPs. Main parameters affecting the extraction efficiency were investigated and optimized. The direct immersion (DI)-SPME procedure combined with gas chromatography-mass spectrometry (GC-MS) for the simultaneous analysis of selected OPPs was successfully applied to the efficient and sensitive determination of analytes of interest in environmental matrices of honey and natural water samples. The developed CA-coated SPME fiber showed good linearity (R2 = 0.981-0.994), low detection limits (0.11-0.83 μg L-1) and satisfactory single fiber and fiber-to-fiber reproducibilities (8.8-12.3%, n = 5 and 11.4-17.2%, n = 3). The performance of the CA-coating was compared with that of commercially available SPME fiber coatings.
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Affiliation(s)
- Piia Jõul
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia Tee 15, 12618 Tallinn, Estonia.
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11
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Heydari M, Jafari MT, Saraji M, Soltani R, Dinari M. Covalent triazine-based framework-grafted functionalized fibrous silica sphere as a solid-phase microextraction coating for simultaneous determination of fenthion and chlorpyrifos by ion mobility spectrometry. Mikrochim Acta 2021; 188:4. [PMID: 33389205 DOI: 10.1007/s00604-020-04685-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 12/07/2020] [Indexed: 11/27/2022]
Abstract
A novel covalent triazine-based framework (CTF)-grafted phenyl-functionalized fibrous silica nanosphere, KCC-1 (named as RS-2) was synthesized via a simple and effective Friedel-Crafts approach. The microporous CTF with fluorene backbone was coupled and grown uniformly on the surface of phenyl-functionalized KCC-1 to prepare a hybrid extended porous framework. The prepared materials were characterized, and FE-SEM and TEM images revealed a flower-like structure for RS-2. The synthesized RS-2 showed excellent thermal stability, so the weight loss was about 30% at 800 °C. RS-2 was applied as a new coating in the solid-phase microextraction procedure to extract chlorpyrifos and fenthion pesticides from water, wastewater, and fruit samples, before determining by corona discharge-ion mobility spectrometry. Some experimental factors affecting the extraction yield of the analytes, including ionic strength, stirring rate, sample pH, extraction temperature, and extraction time, were investigated. Under optimum conditions, the linear dynamic ranges were 0.1-10 μg L-1 and 1.0-70 μg L-1, and the limits of detection were 0.05 and 0.55 μg L-1 for chlorpyrifos and fenthion, respectively. The proposed method showed recovery values in the range 86-117% with a precision of 3.0-7.1% for real samples. Covalent triazine-based framework (CTF)-grafted phenyl-functionalized fibrous silica nanosphere (named as RS-2) was synthesized. RS-2 was applied as a sorbent for solid-phase microextraction (SPME) of chlorpyrifos and fenthion from fruit and water samples followed by corona discharge ionization ion mobility spectrometry (CD-IMS).
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Affiliation(s)
- Maryam Heydari
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Mohammad T Jafari
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
| | - Mohammad Saraji
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Roozbeh Soltani
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Mohammad Dinari
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran
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Moirana RL, Kivevele T, Mkunda J, Mtei K, Machunda R. Trends towards Effective Analysis of Fluorinated Compounds Using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2021; 2021:8837315. [PMID: 33623722 PMCID: PMC7875612 DOI: 10.1155/2021/8837315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 01/15/2021] [Accepted: 01/22/2021] [Indexed: 05/17/2023]
Abstract
Increased demand for monitoring and identification of novel and unknown fluorinated compounds (FCs) has demonstrated the need of sensitive fluorine-specific detectors for unknown FCs in both biological and environmental matrices. Inductively coupled plasma mass spectrometry (ICP-MS) is a promising technique for analysis of FCs and has been rated as the most powerful tool in analytical chemistry. However, direct determination of fluorine using this technique is challenged by high ionization potential of fluorine together with spectral and nonspectral interferences which affect the quality of results. To enhance the quality of results, several studies have reported modifications of a conventional ICP-MS analysis procedure on sample preparation, introduction, analysis, and instrument optimization. Therefore, the focus of this study is to discuss different ICP-MS optimizations and future trends towards the effective analysis of FCs using ICP-MS.
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Affiliation(s)
- Ruth Lorivi Moirana
- The Nelson Mandela African Institution of Science and Technology (NM-AIST), School of Material Energy Water and Environmental Sciences, P.O. Box 447, Arusha, Tanzania
| | - Thomas Kivevele
- The Nelson Mandela African Institution of Science and Technology (NM-AIST), School of Material Energy Water and Environmental Sciences, P.O. Box 447, Arusha, Tanzania
| | - Josephine Mkunda
- The Nelson Mandela African Institution of Science and Technology (NM-AIST), School of Material Energy Water and Environmental Sciences, P.O. Box 447, Arusha, Tanzania
| | - Kelvin Mtei
- The Nelson Mandela African Institution of Science and Technology (NM-AIST), School of Material Energy Water and Environmental Sciences, P.O. Box 447, Arusha, Tanzania
| | - Revocatus Machunda
- The Nelson Mandela African Institution of Science and Technology (NM-AIST), School of Material Energy Water and Environmental Sciences, P.O. Box 447, Arusha, Tanzania
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Azlan NSM, Wee SY, Ismail NAH, Nasir HM, Aris AZ. Organophosphorus Pesticide Multiresidues in Commercialized Asian Rice. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2020; 39:1908-1917. [PMID: 32621623 DOI: 10.1002/etc.4813] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 12/15/2019] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
The organophosphorus pesticides (OPPs) commonly used in agricultural practices can pose a risk of potential exposure to humans via food consumption. We describe an analytical method for solid-phase extraction coupled with high-performance liquid chromatography-diode array detector (SPE-HPLC-DAD) for the detection of OPPs (quinalphos, diazinon, and chlorpyrifos) in rice grains. The isolation of targeted residues was initiated with double extraction before SPE-HPLC-DAD, crucially reducing matrix interferences and detecting a wide range of multiple residues in rice grains. Coefficients of 0.9968 to 0.9991 showed a strong linearity, with limits of detection and quantification ranging from 0.36 to 0.68 µg/kg and from 1.20 to 2.28 µg/kg, respectively. High recoveries (80.4-110.3%) were observed at 3 spiking levels (50, 100, and 200 µg/kg), indicating good accuracy. The relative standard deviations of all residues (0.19-8.66%) validated the method precision. Sample analysis of 10 rice grain types (n = 30) available in the Asian market revealed that quinalphos, diazinon, and chlorpyrifos at concentrations of 1.08, 1.11, and 1.79 µg/kg, respectively, remained far below the maximum residue limits (0.01-0.5 mg/kg). However, regular monitoring is necessary to confirm that multiresidue occurrence remains below permissible limits while controlling pests. Environ Toxicol Chem 2020;39:1908-1917. © 2020 SETAC.
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Affiliation(s)
- Nadiah Syafiqah Mohd Azlan
- Department of Environment, Faculty of Forestry and Environment, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Sze Yee Wee
- Department of Environment, Faculty of Forestry and Environment, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Nur Afifah Hanun Ismail
- Department of Environment, Faculty of Forestry and Environment, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Hanisah Mohmad Nasir
- Department of Environment, Faculty of Forestry and Environment, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Ahmad Zaharin Aris
- Department of Environment, Faculty of Forestry and Environment, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
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Fırat Ö, Tutus R. Comparative Acute Toxicity Assessment of Organophosphate and Avermectin Insecticides on a Freshwater Fish Oreochromis niloticus. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2020; 105:582-587. [PMID: 32948914 DOI: 10.1007/s00128-020-02990-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Accepted: 09/10/2020] [Indexed: 06/11/2023]
Abstract
Oreochromis niloticus was exposed to 10.0 ppb of organophosphate insecticide chlorpyrifos (CPF) and avermectin insecticides abamectin (ABM) and emamectin benzoate (EB) for 48 and 96 h. RBC and Hb decreased in CPF- and ABM-exposed fish after 96-h. Plasma ALT, AST, cortisol, and glucose increased in 96-h CPF-, ABM- and EB-exposed fish, while plasma ions declined in 96-h CPF-exposed ones. Insecticides caused alterations in liver oxidative stress parameters. In fish exposed to CPF, CAT increased after 48-h whereas it decreased after 96-h. Also, CAT declined in 48- and 96-h ABM-exposed fish, whereas it elevated in 48-h EB-exposed ones. Insecticides caused decreases in SOD at 48- and 96-h and in GR after 96-h. GSH elevated in CPF-exposed fish after 48-h, while it decreased in all the tested insecticide exposures after 96-h. Malondialdehyde of fish exposed to insecticides for 96-h increased. Consequently, toxic effects of insecticides on O. niloticus were generally as CPF > ABM > EB.
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Affiliation(s)
- Özgür Fırat
- Department of Biology, Faculty of Science and Letters, Adiyaman University, 02040, Adiyaman, Turkey.
| | - Ramazan Tutus
- Department of Biology, Faculty of Science and Letters, Adiyaman University, 02040, Adiyaman, Turkey
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15
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Nickel foam decorated with ZnO nanocrystals using mesoporous silica templates for ultrasensitive electrogenerated chemiluminescence determination of diazinon. Microchem J 2020. [DOI: 10.1016/j.microc.2019.104540] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Jabali Y, Millet M, El-Hoz M. Spatio-temporal distribution and ecological risk assessment of pesticides in the water resources of Abou Ali River, Northern Lebanon. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:17997-18012. [PMID: 32170616 DOI: 10.1007/s11356-020-08089-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 02/12/2020] [Indexed: 06/10/2023]
Abstract
The objective of this study is to assess the occurrence, spatial, and temporal distribution of forty-eight multiclass pesticides in surface and groundwater samples of the Abou Ali River, located in the North of Lebanon. A 3-year monitoring program (six batches from August 2015 to March 2017) was implemented, and thirty sampling points were selected along the river for analysis. The analysis was executed using a previously developed and optimized solid-phase micro-extraction (SPME) gas-chromatography-mass spectrometry (GC-MS) method. Statistical analysis, using Kolmogorov-Smirnov, Kruskal-Wallis, and Dunnet T3 multiple comparison tests, was applied to compare mean concentrations of pesticides between the different sampling sites and the batches taken. The pesticides that had the highest frequency of detection in the surface and groundwater samples were alachlor, α-endosulfan, and methomyl. For surface water samples, high mean concentrations were perceived for two stations in the upper stream (S5 and S7), two stations (S11 and S14) in the middle stream, and one station (S16) in the lower stream of the river. The highest mean concentrations were observed in October 2015 and August 2016, the time of the year which correlates with the period of pesticide application. Considering groundwater samples, high mean concentrations of pesticides were detected in sites G4, G9, G10, and G12 and during October 2015 and March 2016, following the rainy season. Ecotoxicological risk assessment using the risk quotient (RQ) methodology revealed high risk for five pesticides under average conditions and fourteen under extreme conditions. This study presents, for the first time, a statistical analysis showing the quantification of pesticides in the water resources of the Abou Ali River. In conclusion, it reveals the need to apply a complete pesticide monitoring program, not only for the Abou Ali River but for all the water resources in Lebanon.
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Affiliation(s)
- Yasmine Jabali
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé ICPEES UMR 7515 Groupe de Physico-Chimie de l'Atmosphère, Université de Strasbourg, 67081, Strasbourg, France.
- Environmental Engineering Laboratory: Faculty of Engineering, Civil and Environmental Engineering Department, University of Balamand, Kelhat, El Koura, Lebanon.
| | - Maurice Millet
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé ICPEES UMR 7515 Groupe de Physico-Chimie de l'Atmosphère, Université de Strasbourg, 67081, Strasbourg, France
| | - Mervat El-Hoz
- Environmental Engineering Laboratory: Faculty of Engineering, Civil and Environmental Engineering Department, University of Balamand, Kelhat, El Koura, Lebanon
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Triassi M, Nardone A, Giovinetti MC, De Rosa E, Canzanella S, Sarnacchiaro P, Montuori P. Ecological risk and estimates of organophosphate pesticides loads into the Central Mediterranean Sea from Volturno River, the river of the "Land of Fires" area, southern Italy. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 678:741-754. [PMID: 31082780 DOI: 10.1016/j.scitotenv.2019.04.202] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 04/12/2019] [Accepted: 04/12/2019] [Indexed: 06/09/2023]
Abstract
The organophosphate pesticides pollution in the Volturno River and its environmental impact on the Tyrrhenian Sea (Central Mediterranean Sea) were estimated. Eight selected organophosphate pesticides (diazinon, dimethoate, malathion, chlorpyrifos, pirimiphos-methyl, fenitrothion, methidathion and tolclofos-methyl) were determined in the water dissolved phase, suspended particulate matter and sediment samples collected from 10 sites in different seasons. Total organophosphate pesticides concentrations ranged from 0.12 to 65.09 ng L-1 in water (as the sum of the water dissolved phase and suspended particulate matter) and from 1.19 to 23.17 ng g-1 in sediment samples. It has been calculated that the discharge of pollutants from the Volturno river into the Tyrrhenian Sea was about 71.815, 31 g year-1; for this reason the river is to be considered one of the main mouths of organophosphate pesticides in the Tyrrhenian Sea. In relation to environmental risk assessment, the concentrations of most OPPs in water and sediments from the Volturno River and its estuary were lower than guideline values, but the mean concentration of chlorpyrifos (5.41 ng L-1) in the Volturno River and Estuary has been shown that the ecological integrity of the river watercourse is possibly at risk.
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Affiliation(s)
- Maria Triassi
- Department of Public Health, University "Federico II", Via Sergio Pansini n° 5, 80131 Naples, Italy
| | - Antonio Nardone
- Department of Public Health, University "Federico II", Via Sergio Pansini n° 5, 80131 Naples, Italy
| | | | - Elvira De Rosa
- Department of Public Health, University "Federico II", Via Sergio Pansini n° 5, 80131 Naples, Italy
| | - Silvia Canzanella
- Department of Public Health, University "Federico II", Via Sergio Pansini n° 5, 80131 Naples, Italy
| | - Pasquale Sarnacchiaro
- Department of Economics, University Unitelma Sapienza, Viale Regina Elena 295, Rome, Italy
| | - Paolo Montuori
- Department of Public Health, University "Federico II", Via Sergio Pansini n° 5, 80131 Naples, Italy.
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18
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Jabali Y, Millet M, El-Hoz M. Optimization of a DI-SPME-GC–MS/MS method for multi-residue analysis of pesticides in waters. Microchem J 2019. [DOI: 10.1016/j.microc.2019.03.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Shrivastav AM, Sharma G, Jha R. Hypersensitive and selective biosensing based on microfiber interferometry and molecular imprinted nanoparticles. Biosens Bioelectron 2019; 141:111347. [PMID: 31226605 DOI: 10.1016/j.bios.2019.111347] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 05/17/2019] [Accepted: 05/21/2019] [Indexed: 12/12/2022]
Abstract
The molecular imprinting techniques with interferometric platform are promising for next-generation optical sensors for online and remote biosensing and device applications. This technique has shown a tremendous potential to provide a highly specific detection of target analyte/molecule with artificial complementary scaffolds in the polymeric nanostructures relay with tunable aspect ratio, low cost synthesis procedure and applicability in harsh environment. To date, no molecular imprinted nanoparticles has been integrated with optical microwire platform in the literature. Here, we report the synthesis of a molecularly imprinted nanocarrier using hydrothermal process that act as receptors and combines optical microwire as transducing support. The detailed sensing process for one of the widely used pesticides (parathion methyl) in the detection range of 10-12 to 10-4 M with hyper-sensitivity and detection limit of 1.30 × 1012 nm/M and 79.43 fM respectively have been achieved. The compact sensing probe tested with real water samples collected from various sources show percentage recovery of around 100%. We strongly believe that the process for probe development will open a new gateway for next generation selective biosensing for biomedical research applications.
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Affiliation(s)
- Anand M Shrivastav
- Nanophotonics & Plasmonics Laboratory, School of Basic Sciences, Indian Institute of Technology Bhubaneswar, India
| | - Gaurav Sharma
- Nanophotonics & Plasmonics Laboratory, School of Basic Sciences, Indian Institute of Technology Bhubaneswar, India
| | - Rajan Jha
- Nanophotonics & Plasmonics Laboratory, School of Basic Sciences, Indian Institute of Technology Bhubaneswar, India.
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20
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Kermani M, Jafari MT, Saraji M. Porous magnetized carbon sheet nanocomposites for dispersive solid-phase microextraction of organophosphorus pesticides prior to analysis by gas chromatography-ion mobility spectrometry. Mikrochim Acta 2019; 186:88. [PMID: 30631951 DOI: 10.1007/s00604-018-3215-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Accepted: 12/28/2018] [Indexed: 10/27/2022]
Abstract
Carbon sheets were attached to magnetite (Fe3O4) nanoparticles. The resulting nanocomposite is shown to be a viable sorbent for use in magnetic dispersive solid-phase microextraction of three organophosphorus pesticides. The sorbent was synthesized via the sol-gel process followed by calcination and was characterized by an X-ray diffractometer, field emission scanning electron microscopy and energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and Raman spectrometry techniques. The affecting parameters in the adsorption and desorption steps were assessed and optimized via response surface methodology. Following desorption with dichloromethane, the OPPs were quantified by gas chromatography along with ion mobility spectrometry detection. Under optimized conditions, the limits of detection were 1.00, 0.46 and 0.85 μg L-1 for fenthion, malathion and chlorpyrifos, respectively. Response is linear in the concentration range of 2-500 μg L-1 for fenthion and malathion, and 2-1000 μg L-1 for chlorpyrifos with the determination coefficient larger than 0.9969. The intra-day and inter-day precision were from 3 to 9% and 5 to 16%, respectively. The enrichment factor was greater than 142 for all the studied pesticides. The sorbent was used for analyze spiked water and vegetable samples and gave relative recovery higher than 82%. Graphical abstract A flowchart of the synthesis of porous magnetized carbon sheet nanocomposites and the process of the magnetic dispersive solid-phase microextraction (MD-μ-SPE) of three organophosphorus pesticides prior to analysis by gas chromatography-ion mobility spectrometry (GC-IMS).
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Affiliation(s)
- Mansoure Kermani
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Mohammad T Jafari
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
| | - Mohammad Saraji
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran
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21
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Jafari MT, Saraji M, Kermani M. Sol-gel electrospinning preparation of hybrid carbon silica nanofibers for extracting organophosphorus pesticides prior to analyzing them by gas chromatography-ion mobility spectrometry. J Chromatogr A 2018; 1558:1-13. [DOI: 10.1016/j.chroma.2018.05.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 04/24/2018] [Accepted: 05/07/2018] [Indexed: 01/31/2023]
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22
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Mu R, He X, Gao X, Jia J, Li J. Determination of Malathion Using Corona Discharge – Ion Mobility Spectrometry with Solid-Phase Microextraction. ANAL LETT 2017. [DOI: 10.1080/00032719.2017.1362645] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ren Mu
- School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing, China
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, China
| | - Xiuli He
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, China
| | - Xiaoguang Gao
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, China
| | - Jian Jia
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, China
| | - Jianping Li
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, China
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23
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SUN TF, XIANG L, CHEN L, XIAO T, MO CH, LI YW, CAI QY, HU GC, HE DC. Research Progresses of Determination of Perfluorinated Compounds in Environmental Water and Solid Samples. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2017. [DOI: 10.1016/s1872-2040(17)61009-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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24
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Sukmanee T, Wongravee K, Ekgasit S, Thammacharoen C, Pienpinijtham P. Facile and Sensitive Detection of Carbofuran Carbamate Pesticide in Rice and Soybean Using Coupling Reaction-based Surface-Enhanced Raman Scattering. ANAL SCI 2017; 33:89-94. [PMID: 28070083 DOI: 10.2116/analsci.33.89] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 11/10/2016] [Indexed: 12/16/2023]
Abstract
In this research, a sensitive and selective method for detecting one of the most toxic insecticides, "carbofuran", in rice and soybean is presented. This method is based on the coupling reaction of diazonium ion combined with a surface-enhanced Raman scattering technique. Diazonium ion produced from p-aminothiophenol reacts specifically with carbofuran phenol from the hydrolysis of carbofuran. The generated azo compounds attach to the surface of silver nanoparticles via the Ag-S bond. Therefore, a strong Raman intensity can be obtained. The concentration of carbofuran can be determined by following the intensity of the peak at 1201 cm-1, attributed to the C-N stretching vibration of the azo compound. The result shows a good linear correlation (R2 = 0.9786) against carbofuran concentrations (0.1 - 5 ppm) with a detection limit of 0.452 ppm. Our proposed protocol is insignificantly influenced by various common interferences. Moreover, this method has been successfully validated to determine carbofuran concentrations in rice and soybean with detection limits of 0.446 and 0.520 ppm, respectively.
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Affiliation(s)
- Thanyada Sukmanee
- Sensor Research Unit (SRU), Department of Chemistry, Faculty of Science, Chulalongkorn University
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25
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Abd-Alrahman SH, Zidan Z, Abdel-Megeed M, Almaz MM, H Mohamady A, Mostafa A. Thermodynamic and aquatic photodegradation of herbicide butachlor. DESALINATION AND WATER TREATMENT 2016; 57:23808-23813. [DOI: 10.1080/19443994.2015.1136240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Accepted: 12/13/2015] [Indexed: 09/02/2023]
Affiliation(s)
- Sherif H. Abd-Alrahman
- Biochemistry Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia, Tel
- Agricultural Research Center, Pesticides Residue and Environmental Pollution Department, Central Agricultural Pesticide Laboratory, Giza 12618, Egypt
| | - Z.H. Zidan
- Faculty of Agriculture, Department of Plant Protection, Ain Shams University, Kalubia, Egypt
| | - M.I. Abdel-Megeed
- Faculty of Agriculture, Department of Plant Protection, Ain Shams University, Kalubia, Egypt
| | - Monir M. Almaz
- Agricultural Research Center, Pesticides Residue and Environmental Pollution Department, Central Agricultural Pesticide Laboratory, Giza 12618, Egypt
| | - Aziza H Mohamady
- Agriculture Research Center, Bioassay Department, Pesticide Central Laboratory, Giza 12618, Egypt
| | - A. Mostafa
- Department of Botany and Microbiology, Collage of Science, King Saud University, P.O. Box 2455, Riyadh 11451 Kingdom of Saudi Arabia
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26
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Montuori P, Aurino S, Garzonio F, Sarnacchiaro P, Polichetti S, Nardone A, Triassi M. Estimates of Tiber River organophosphate pesticide loads to the Tyrrhenian Sea and ecological risk. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 559:218-231. [PMID: 27065443 DOI: 10.1016/j.scitotenv.2016.03.156] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 03/21/2016] [Accepted: 03/21/2016] [Indexed: 06/05/2023]
Abstract
The organophosphate pesticides pollution in the Tiber River and its environmental impact on the Tyrrhenian Sea (Central Mediterranean Sea) were estimated. Eight selected organophosphate pesticides (diazinon, dimethoate, malathion, chlorpyrifos, pirimiphos-methyl, fenitrothion, methidathion, tolclofos-methyl) were determined in the water dissolved phase, suspended particulate matter and sediment samples collected from 21 sites in different seasons. Total organophosphate pesticides concentrations ranged from 0.40 to 224.48ngL(-1) in water (as the sum of the water dissolved phase and suspended particulate matter) and from 1.42 to 68.46ngg(-1) in sediment samples. Contaminant discharges of organophosphate pesticides into the sea were calculated in about 545.36kgyear(-1) showing that this river should be consider as one of the main contribution sources of organophosphate pesticides to the Tyrrhenian Sea. In relation to the eco-toxicological assessment, the concentrations of most OPPs in the water and sediments from the Tiber River and its estuary were lower than guideline values.
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Affiliation(s)
- Paolo Montuori
- Department of Public Health, University "Federico II", Via Sergio Pansini nº 5, 80131 Naples, Italy.
| | - Sara Aurino
- Department of Public Health, University "Federico II", Via Sergio Pansini nº 5, 80131 Naples, Italy
| | - Fatima Garzonio
- Department of Public Health, University "Federico II", Via Sergio Pansini nº 5, 80131 Naples, Italy
| | - Pasquale Sarnacchiaro
- Department of Economics, University Unitelma Sapienza, Viale Regina Elena nº 295, 00161 Rome, Italy
| | - Salvatore Polichetti
- Department of Public Health, University "Federico II", Via Sergio Pansini nº 5, 80131 Naples, Italy
| | - Antonio Nardone
- Department of Public Health, University "Federico II", Via Sergio Pansini nº 5, 80131 Naples, Italy
| | - Maria Triassi
- Department of Public Health, University "Federico II", Via Sergio Pansini nº 5, 80131 Naples, Italy
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27
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Jiang L, Huang T, Feng S, Wang J. Zirconium(IV) functionalized magnetic nanocomposites for extraction of organophosphorus pesticides from environmental water samples. J Chromatogr A 2016; 1456:49-57. [DOI: 10.1016/j.chroma.2016.06.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 05/30/2016] [Accepted: 06/02/2016] [Indexed: 11/17/2022]
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28
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Sharma A, Pandit J, Sharma R, Shirkot P. Biodegradation of Chlorpyrifos by Pseudomonas Resinovarans Strain AST2.2 Isolated from Enriched Cultures. ACTA ACUST UNITED AC 2016. [DOI: 10.12944/cwe.11.1.33] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A bacterial strain AST2.2 with chlorpyrifos degrading ability was isolated by enrichment technique from apple orchard soil with previous history of chlorpyrifos use. Based on the morphological, biochemical tests and 16S rRNA sequence analysis, AST2.2 strain was identified as Pseudomonas resinovarans. The strain AST2.2 utilized chlorpyrifos as the sole source of carbon and energy. This strain exhibited growth upto 400mg/l concentration of chlorpyrifos and exhibited high extracellular organophosphorus hydrolase (OPH) activity. Gas chromatography-flame ionization detector (GC-FID) studies revealed that Pseudomonas resinovarans AST2.2 degraded 43.90 % of chlorpyrifos (400 mg/l) within 96 hrs. Intermediates of chlorpyrifos degradation were identified using GC-MS. This strain have potential to degrade chlorpyrifos and thus can be used for bioremediation and ecological restoration of sites contaminated with chlorpyrifos
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Affiliation(s)
- Anish Sharma
- Department of Biotechnology, Dr Y S Parmar University of Horticulture and Forestry, Nauni, 173 230 India
| | - Jyotsana Pandit
- Department of Biotechnology, Dr Y S Parmar University of Horticulture and Forestry, Nauni, 173 230 India
| | - Ruchika Sharma
- Department of Biotechnology, Dr Y S Parmar University of Horticulture and Forestry, Nauni, 173 230 India
| | - Poonam Shirkot
- Department of Biotechnology, Dr Y S Parmar University of Horticulture and Forestry, Nauni, 173 230 India
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29
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Berijani S, Sadigh M, Pournamdari E. Homogeneous Liquid–Liquid Microextraction for Determination of Organophosphorus Pesticides in Environmental Water Samples Prior to Gas Chromatography-Flame Photometric Detection. J Chromatogr Sci 2016; 54:1061-7. [DOI: 10.1093/chromsci/bmw020] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Indexed: 11/12/2022]
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30
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Zhou M, Hu N, Shu S, Wang M. Molecularly imprinted nanomicrospheres as matrix solid-phase dispersant combined with gas chromatography for determination of four phosphorothioate pesticides in carrot and yacon. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2015; 2015:385167. [PMID: 25954569 PMCID: PMC4411505 DOI: 10.1155/2015/385167] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 03/10/2015] [Accepted: 03/19/2015] [Indexed: 06/04/2023]
Abstract
An efficient, rapid, and selective method for sample pretreatment, namely, molecularly imprinted matrix solid-phase dispersion (MI-MSPD) coupled with gas chromatography (GC), was developed for the rapid isolation of four phosphorothioate organophosphorus pesticides (tolclofos-methyl, phoxim, chlorpyrifos, and parathion-methyl) from carrot and yacon samples. New molecularly imprinted polymer nanomicrospheres were synthesized by using typical structural analogue tolclofos-methyl as a dummy template via surface grafting polymerization on nanosilica. Then, these four pesticides in carrot and yacon were extracted and adsorbed using the imprinted nanomicrospheres and further determined by gas chromatography. Under the optimized conditions, a good linearity of four pesticides was obtained in a range of 0.05-17.0 ng·g(-1) with R varying from 0.9971 to 0.9996, and the detection limit of the method was 0.012~0.026 ng·g(-1) in carrot and yacon samples. The recovery rates at two spiked levels were in the range of 85.4-105.6% with RSD ≤9.6%. The presented MI-MSPD method combined the advantages of MSPD for allowing the extraction, dispersion, and homogenization in two steps and the advantages of MIPs for high affinity and selectivity towards four phosphorothioate pesticides, which could be applied to the determination of pesticide residues in complicated vegetal samples.
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Affiliation(s)
- Mengchun Zhou
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Nana Hu
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Shaohua Shu
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Mo Wang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
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31
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Sol–gel/nanoclay composite as a solid-phase microextraction fiber coating for the determination of organophosphorus pesticides in water samples. Anal Bioanal Chem 2014; 407:1241-52. [DOI: 10.1007/s00216-014-8344-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Revised: 11/04/2014] [Accepted: 11/13/2014] [Indexed: 10/24/2022]
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32
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Rapid determination of disulfoton and its oxidative metabolites in human whole blood and urine using QuEChERS extraction and liquid chromatography–tandem mass spectrometry. Leg Med (Tokyo) 2012; 14:309-16. [DOI: 10.1016/j.legalmed.2012.06.005] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Revised: 05/16/2012] [Accepted: 06/20/2012] [Indexed: 11/20/2022]
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33
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Wang S, Xiang B, Tang Q. Trace determination of dichlorvos in environmental samples by room temperature ionic liquid-based dispersive liquid-phase microextraction combined with HPLC. J Chromatogr Sci 2012; 50:702-8. [PMID: 22618021 DOI: 10.1093/chromsci/bms058] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Using 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) room temperature ionic liquid (RTIL) as extraction solvent, tetrahydrofuran (THF) as disperser solvent, the organophosphorus pesticide dichlorvos in water was determined by dispersive liquid-liquid microextraction (DLLME) combined with high-performance liquid chromatography. Factors affecting RTIL-DLLME (type of disperser solvent, amount of RTIL, volume of disperser solvent, percentage of NaCl and volume and pH of water sample) were optimized by the single-factor method, obtaining the most favorable results when using 65 µL of [BMIM][PF6] and 260 µL of THF to extract the compound from an 8-mL water sample at pH 5.0 containing 25% (w/v) of NaCl. Under these optimum conditions, an enrichment factor of 215-fold was obtained. The calibration curves were linear in the concentration range of 2-1,000 µg/L. The limit of detection calculated at a signal-to-noise ratio of 3 was 0.2 µg/L. The relative standard deviations (RSD) for six replicate experiments at 20, 100 and 200 µg/L concentration levels were 1.8%, 1.3% and 1.3 %, respectively. Then the proposed method was applied to the analysis of three different water sample sources (tap, farm and rain water) and the relative recoveries and RSD of spiked water samples were 95.6-102.4% and 0.6-3.1%, respectively, at three different concentration levels of 20, 100 and 200 µg/L.
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Affiliation(s)
- Songhui Wang
- Center for Instrumental Analysis, Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, 210009 Nanjing, People's Republic of China.
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