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Grasselli G, Arigò A, Palma P, Famiglini G, Cappiello A. Latest Developments in Direct and Non-Direct LC-MS Methods Based on Liquid Electron Ionization (LEI). Crit Rev Anal Chem 2024:1-18. [PMID: 39046707 DOI: 10.1080/10408347.2024.2381543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
Mass spectrometry (MS) enables precise identification and quantification of molecules, particularly when combined with chromatography. The advent of atmospheric pressure ionization (API) techniques allowed the efficient coupling of liquid chromatography with MS (LC-MS), extending analyses to nonvolatile and thermolabile compounds. API techniques present limitations such as low informative capacity and reproducibility of mass spectra, increasing instrument complexity and costs. Other challenges include analyzing poorly polar molecules and matrix effects (ME), which negatively impact quantitative analyses, necessitating extensive sample purification or using expensive labeled standards. These limitations prompted the exploration of alternative solutions, leading to the development of the Liquid Electron Ionization (LEI) interface. The system has demonstrated excellent robustness and reproducibility. LEI has been employed to analyze various compounds, including pesticides, drugs of abuse, phenols, polycyclic aromatic hydrocarbons (PAHs), phthalates, and many others. Its versatility has been validated with single quadrupole, triple quadrupole, and QToF detectors, operating in electron ionization (EI) or chemical ionization (CI) modes and with both reverse phase liquid chromatography (RPLC) and normal phase liquid chromatography (NPLC). LEI has also been successfully integrated with the Microfluidic Open Interface (MOI), Membrane Introduction Mass Spectrometry (MIMS), and Microfluidic Water-Assisted Trap Focusing (M-WATF), broadening its application scope and consistently demonstrating promising results in terms of sensitivity and identification power. The most recent advancement is the development of Extractive-Liquid Sampling Electron Ionization-Mass Spectrometry (E-LEI-MS), a surface sampling and real-time analysis technique based on the LEI concept. This review article offers a comprehensive and up-to-date picture of the potential of LEI.
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Affiliation(s)
- Genny Grasselli
- Department of Pure and Applied Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Adriana Arigò
- Department of Pure and Applied Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Pierangela Palma
- Department of Pure and Applied Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Giorgio Famiglini
- Department of Pure and Applied Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Achille Cappiello
- Department of Pure and Applied Sciences, University of Urbino Carlo Bo, Urbino, Italy
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2
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Fedorenko D, Bartkevics V. Recent Applications of Nano-Liquid Chromatography in Food Safety and Environmental Monitoring: A Review. Crit Rev Anal Chem 2021; 53:98-122. [PMID: 34392753 DOI: 10.1080/10408347.2021.1938968] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
In recent years, a trend toward instrument miniaturization has led to the development of new and sophisticated analytical systems, such as nano-liquid chromatography (nano-LC), which has enabled improvements of sensitivity, as well as chromatographic resolution. The growing interest in nano-LC methodology has resulted in a variety of innovative and promising applications. In this article, we review the applications of nano-LC separation methods coupled with mass spectrometry in the analysis of food and environmental samples. An assessment of sample preparation methods and analytical performance are provided, along with comparison to other, more established analytical techniques. Three main groups of compounds that are crucial for food safety assessment are considered in this review: pharmaceuticals (including antibiotics), pesticides, and mycotoxins. Recent practical applications of the nano-LC method in the determination of these compounds are discussed. Furthermore, we also focus on methods for the determination of various environmental contaminants using nano-LC methods. Future perspectives for the development of nano-LC methods are discussed.
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Affiliation(s)
- Deniss Fedorenko
- Institute of Food Safety, Animal Health and Environment "BIOR", Riga, Latvia.,University of Latvia, Faculty of Chemistry, Riga, Latvia
| | - Vadims Bartkevics
- Institute of Food Safety, Animal Health and Environment "BIOR", Riga, Latvia.,University of Latvia, Faculty of Chemistry, Riga, Latvia
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3
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Termopoli V, Famiglini G, Vocale P, Morini GL, Palma P, Rocío-Bautista P, Saeed M, Perry S, Cappiello A. Microfluidic water-assisted trap focusing method for ultra-large volume injection in reversed-phase nano-liquid chromatography coupled to electron ionization tandem-mass spectrometry. J Chromatogr A 2020; 1627:461421. [PMID: 32823116 DOI: 10.1016/j.chroma.2020.461421] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 07/16/2020] [Accepted: 07/18/2020] [Indexed: 10/23/2022]
Abstract
Herein we present an efficient, column-switching method that relies on a custom-made T-union passive diffusion micromixer to assist water dilution and promote trap solute focusing of a high sample volume dissolved in pure organic solvent using a 0.075 mm i.d. nano-LC column. This method allows injecting 20 μL (or higher) of sample volume, speeding up the analysis time, with a 400-fold increase of the limits of quantitation for selected compounds. Five pesticides in different media were used as model compounds, and the analyses were carried out with a triple quadrupole mass spectrometer equipped with a Liquid Electron Ionization (LEI) LC-MS interface working in multiple reaction monitoring (MRM) mode. The system microfluidics were investigated using COMSOL modeling software. Robustness of the entire system was evaluated using a post-extraction addition soil extracts with limits of detection values spanning from 0.10 to 0.45 µg/L. Reproducible results in terms of peak area, peak shape, and retention times were achieved in soil matrix. Repeatability test on peak area variations were lower than 10%.
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Affiliation(s)
- Veronica Termopoli
- Dipartimento di Scienze Pure ed Applicate, Università degli Studi di Urbino Carlo Bo, 61029, Urbino, Italy.
| | - Giorgio Famiglini
- Dipartimento di Scienze Pure ed Applicate, Università degli Studi di Urbino Carlo Bo, 61029, Urbino, Italy
| | - Pamela Vocale
- Dipartimento di Ingegneria e Architettura, Università degli Studi di Parma, 43124, Parma, Italy
| | - Gian Luca Morini
- Dipartimento di Ingegneria, Università degli Studi di Bologna, 40136, Bologna, Italy
| | - Pierangela Palma
- Dipartimento di Scienze Pure ed Applicate, Università degli Studi di Urbino Carlo Bo, 61029, Urbino, Italy; Chemistry Department, Vancouver Island University VIU, Nanaimo, BC, V9R5S5, Canada
| | - Priscilla Rocío-Bautista
- Dipartimento di Scienze Pure ed Applicate, Università degli Studi di Urbino Carlo Bo, 61029, Urbino, Italy
| | - Mansoor Saeed
- Syngenta Jealott's Hill International Research Center, RG42 6EY, Bracknell, UK
| | - Simon Perry
- Syngenta Jealott's Hill International Research Center, RG42 6EY, Bracknell, UK
| | - Achille Cappiello
- Dipartimento di Scienze Pure ed Applicate, Università degli Studi di Urbino Carlo Bo, 61029, Urbino, Italy; Chemistry Department, Vancouver Island University VIU, Nanaimo, BC, V9R5S5, Canada
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4
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Mejía-Carmona K, Maciel EVS, Lanças FM. Miniaturized liquid chromatography applied to the analysis of residues and contaminants in food: A review. Electrophoresis 2020; 41:1680-1693. [PMID: 32359175 DOI: 10.1002/elps.202000019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 04/15/2020] [Accepted: 04/17/2020] [Indexed: 12/21/2022]
Abstract
The humankind is pretty dependent on food to control several biological processes into the organism. As the world population increases, the demand for foodstuffs follows the same trend claiming for a high food production situation. For this reason, a substantial amount of chemicals is used in agriculture and livestock husbandries every year, enhancing the likelihood of contaminated foodstuffs being commercialized. This outlook becomes a public health concern; thus, the governmental regulatory agencies impose laws to control the residues and contaminants in food matrices. Currently, one of the most important analytical techniques to perform it is LC. Despite its already recognized effectiveness, it is often time consuming and requires significant volumes of reagents, which are transformed into toxic waste. In this context, miniaturized LC modes emerge as a greener and more effective analytical technique. They have remarkable advantages, including higher sensitivity, lower sample amount, solvent and stationary phase requirements, and more natural coupling to MS. In this review, most of the critical characteristics of them are discussed, focusing on the benchtop instruments and their related analytical columns. Additionally, a discussion regarding the last 10 years of publications reporting miniaturized LC application for the analysis of natural and industrial food samples is categorized. The main chemical classes as applied in the crops are highlighted, including pesticides, veterinary drugs, and mycotoxins.
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Affiliation(s)
- Karen Mejía-Carmona
- São Carlos Institute of Chemistry, University of São Paulo, São Paulo, Brazil
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5
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Robidillo CJT, Wandelt S, Dalangin R, Zhang L, Yu H, Meldrum A, Campbell RE, Veinot JGC. Ratiometric Detection of Nerve Agents by Coupling Complementary Properties of Silicon-Based Quantum Dots and Green Fluorescent Protein. ACS APPLIED MATERIALS & INTERFACES 2019; 11:33478-33488. [PMID: 31414591 DOI: 10.1021/acsami.9b10996] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Ratiometric photoluminescent detection of the toxicologically potent organophosphate ester nerve agents paraoxon (PX) and parathion (PT) using the complementary optical and chemical properties of the long Stokes shift green fluorescent protein variant, mAmetrine1.2 (mAm), and red-emitting silicon-based quantum dots (SiQDs) is reported. PX and PT selectively quench SiQD photoluminescence (PL) through a dynamic quenching mechanism, thereby, facilitating the development of a ratiometric sensor platform that shows micromolar limits of detection for PX and PT and that is unaffected by the presence of common inorganic and organic interferents. As a part of the present study, we also demonstrate that the paper-based sensors derived from mAm and SiQDs detect PX and PT at concentrations as low as 5 μM using a readily available commercial color analysis smartphone "app". The ratiometric sensor reported herein can potentially be used for the convenient and rapid on-site detection and quantification of PX and PT in real-world samples.
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Affiliation(s)
- Christopher Jay T Robidillo
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
- Department of Physical Sciences and Mathematics , University of the Philippines Manila , P. Faura Street , Ermita, Manila 1000 , Philippines
| | - Sophia Wandelt
- Faculty of Chemistry and Pharmacy , Ludwig-Maximilians-Universität München , Munich 81377 , Germany
| | - Rochelin Dalangin
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Lijuan Zhang
- Department of Physics , University of Alberta , Edmonton , Alberta T6G 2E1 , Canada
| | - Haoyang Yu
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Alkiviathes Meldrum
- Department of Physics , University of Alberta , Edmonton , Alberta T6G 2E1 , Canada
| | - Robert E Campbell
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
- Department of Chemistry , The University of Tokyo , Tokyo 113-0033 , Japan
| | - Jonathan G C Veinot
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
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What are the Main Sensor Methods for Quantifying Pesticides in Agricultural Activities? A Review. Molecules 2019; 24:molecules24142659. [PMID: 31340442 PMCID: PMC6680408 DOI: 10.3390/molecules24142659] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/13/2019] [Accepted: 07/16/2019] [Indexed: 11/29/2022] Open
Abstract
In recent years, there has been an increase in pesticide use to improve crop production due to the growth of agricultural activities. Consequently, various pesticides have been present in the environment for an extended period of time. This review presents a general description of recent advances in the development of methods for the quantification of pesticides used in agricultural activities. Current advances focus on improving sensitivity and selectivity through the use of nanomaterials in both sensor assemblies and new biosensors. In this study, we summarize the electrochemical, optical, nano-colorimetric, piezoelectric, chemo-luminescent and fluorescent techniques related to the determination of agricultural pesticides. A brief description of each method and its applications, detection limit, purpose—which is to efficiently determine pesticides—cost and precision are considered. The main crops that are assessed in this study are bananas, although other fruits and vegetables contaminated with pesticides are also mentioned. While many studies have assessed biosensors for the determination of pesticides, the research in this area needs to be expanded to allow for a balance between agricultural activities and environmental protection.
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Chen H, Wang C, Zhang Z, He L. Combining Headspace Solid-Phase Microextraction and Surface-Enhanced Raman Spectroscopy To Detect the Pesticide Fonofos in Apple Juice. J Food Prot 2018; 81:1087-1092. [PMID: 29897273 DOI: 10.4315/0362-028x.jfp-17-505] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We developed an innovative approach that couples headspace solid-phase microextraction (SPME) with surface-enhanced Raman spectroscopy (SERS) to detect a volatile pesticide (i.e., fonofos) in a liquid complex matrix (i.e., apple juice). A gold nanoparticles-coated fiber was fabricated by reducing gold(III) on a chemically etched stainless steel wire to extract pesticide, using SPME. The fabricated fibers were then tested by a headspace-SPME method and a dip-SPME method, followed by SERS detection of fonofos in water and apple juice samples. Using the headspace-SPME method, we can detect as low as 5 ppb of fonofos in water and apple juice, compared with the dip-SPME method, which cannot detect lower than 10 ppb in water and 50 ppb in apple juice. This study demonstrated the potential capability of the headspace-SPME-SERS method for rapid (within 30 min) and sensitive detection of volatile and vaporizable compounds in complex matrices. The developed method could be a potential alternative approach to the gas chromatography method. Future work is needed to optimize the fiber by minimizing signal variation, and it should be tested in a variety of targeted compounds and matrices.
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Affiliation(s)
- Haoxin Chen
- 1 Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01003, USA (ORCID: http://orcid.org/0000-0001-8461-5325 [H.C.]); and
| | - Chunrong Wang
- 1 Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01003, USA (ORCID: http://orcid.org/0000-0001-8461-5325 [H.C.]); and.,2 School of Food Science and Technology, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
| | - Zhiyun Zhang
- 1 Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01003, USA (ORCID: http://orcid.org/0000-0001-8461-5325 [H.C.]); and
| | - Lili He
- 1 Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01003, USA (ORCID: http://orcid.org/0000-0001-8461-5325 [H.C.]); and
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8
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A review of nanoscale LC-ESI for metabolomics and its potential to enhance the metabolome coverage. Talanta 2018; 182:380-390. [PMID: 29501168 DOI: 10.1016/j.talanta.2018.01.084] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 01/29/2018] [Accepted: 01/30/2018] [Indexed: 12/22/2022]
Abstract
Liquid chromatography-electrospray ionisation-mass spectrometry (LC-ESI-MS) platforms are widely used to perform high throughput untargeted profiling of biological samples for metabolomics-based approaches. However, these LC-ESI platforms usually favour the detection of metabolites present at relatively high concentrations because of analytical limitations such as ion suppression, thus reducing overall sensitivity. To counter this issue of sensitivity, the latest in terms of analytical platforms can be adopted to enable a greater portion of the metabolome to be analysed in a single analytical run. Here, nanoflow liquid chromatography-nanoelectrospray ionisation (nLC-nESI), which has previously been utilised successfully in proteomics, is explored for use in metabolomic and exposomic research. As a discovery based field, the markedly increased sensitivity of these nLC-nESI platforms offer the potential to uncover the roles played by low abundant signalling metabolites (e.g. steroids, eicosanoids) in health and disease studies, and would also enable an improvement in the detection of xenobiotics present at trace levels in biological matrices to better characterise the chemical exposome. This review aims to give an insight into the advantages associated with nLC-nESI for metabolomics-based approaches. Initially we detail the source of improved sensitivity prior to reviewing the available approaches to achieving nanoflow rates and nanospray ionisation for metabolomics. The robustness of nLC-nESI platforms was then assessed using the literature available from a metabolomic viewpoint. We also discuss the challenging point of sample preparation which needs to be addressed to fully enjoy the benefits of these nLC-nESI platforms. Finally, we assess metabolomic analysis utilising nano scale platforms and look ahead to the future of metabolomics using these new highly sensitive platforms.
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9
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In tube-solid phase microextraction-nano liquid chromatography: Application to the determination of intact and degraded polar triazines in waters and recovered struvite. J Chromatogr A 2017; 1513:51-58. [DOI: 10.1016/j.chroma.2017.07.053] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 07/14/2017] [Accepted: 07/17/2017] [Indexed: 11/21/2022]
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10
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Fanali S. Nano-liquid chromatography applied to enantiomers separation. J Chromatogr A 2017; 1486:20-34. [DOI: 10.1016/j.chroma.2016.10.028] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 10/01/2016] [Accepted: 10/11/2016] [Indexed: 10/20/2022]
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11
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Márta Z, Bobály B, Fekete J, Magda B, Imre T, Mészáros KV, Szabó PT. Pushing quantitation limits in micro UHPLC–MS/MS analysis of steroid hormones by sample dilution using high volume injection. J Pharm Biomed Anal 2016; 129:135-141. [DOI: 10.1016/j.jpba.2016.06.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 06/15/2016] [Accepted: 06/17/2016] [Indexed: 12/21/2022]
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12
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Chen XJ, Ren YJ, Meng ZY, Lu CL, Gu HT, Zhuang YQ. Dissipation kinetics, safety evaluation, and preharvest interval assessment of trichlorfon application on rice. ENVIRONMENTAL MONITORING AND ASSESSMENT 2016; 188:266. [PMID: 27048491 DOI: 10.1007/s10661-016-5264-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Accepted: 03/23/2016] [Indexed: 06/05/2023]
Abstract
Nowadays, there is an urgent need for the investigation of the field dissipation and assessment of the preharvest interval for trichlorfon residues on rice. To protect consumers from potential health risks, this study can provide references for the safe application of trichlorfon in the rice fields. Results of the field dissipation study showed that the dissipation dynamic equations of trichlorfon were based on the first-order reaction dynamic equations and that the dissipation rates vary among rice plant, brown rice, rice bran, soil, and water. The 2-year field trials conducted in Yangzhou and Xiaogan suggested the interval of each application for trichlorfon on rice to be at least 7 days when 80 % trichlorfon SP was sprayed with a dose ranges between 80 and 160 a.i g/667 m(2). Additionally, the preharvest interval of the last application should be at least 15 days to ensure the amounts of residues below the maximum residue limits of trichlorfon on brown rice (0.1 mg/kg).
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Affiliation(s)
- Xiao-Jun Chen
- Joint International Research Laboratory of Agriculture & Agri-Product Safety Yangzhou University, Yangzhou, Jiangsu, 225009, People's Republic China.
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, 225009, People's Republic China.
| | - Ya-jun Ren
- Joint International Research Laboratory of Agriculture & Agri-Product Safety Yangzhou University, Yangzhou, Jiangsu, 225009, People's Republic China
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, 225009, People's Republic China
| | - Zhi-yuan Meng
- Joint International Research Laboratory of Agriculture & Agri-Product Safety Yangzhou University, Yangzhou, Jiangsu, 225009, People's Republic China
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, 225009, People's Republic China
| | - Chun-liang Lu
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, 225009, People's Republic China
| | - Hao-tian Gu
- Joint International Research Laboratory of Agriculture & Agri-Product Safety Yangzhou University, Yangzhou, Jiangsu, 225009, People's Republic China
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, 225009, People's Republic China
| | - Yi-qing Zhuang
- Zhenjiang Academy of Agricultural Sciences, Zhenjiang, Jiangsu, 212400, People's Republic China
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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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14
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Mateos-Vivas M, Fanali S, Rodríguez-Gonzalo E, Carabias-Martínez R, Aturki Z. Rapid determination of nucleotides in infant formula by means of nano-liquid chromatography. Electrophoresis 2016; 37:1873-80. [PMID: 26791135 DOI: 10.1002/elps.201500526] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 12/23/2015] [Accepted: 01/11/2016] [Indexed: 01/11/2023]
Abstract
A rapid method for the quantification of five ribonucleotides 5'- monophophates (adenosine, cytidine, guanosine, inosine, uridine, 5'-monophosphate), in infant formula, has been proposed using nano-LC. To separate the studied compounds, capillary columns packed with different C18-based stationary phases were investigated. All the columns tested were laboratory prepared. The experiments were performed in ion-pairing RP chromatographic mode using tetrabutylammonium hydroxide as ion-pairing reagent. The method was developed using a core-shell XB-C18 capillary column with a mobile phase consisting of 5% v/v methanol and 95% v/v 100 mM ammonium formate, pH 8, containing 20 mM tetrabutylammonium hydroxide. All compounds were baseline resolved in less than 5 min with a flow rate of 500 nL/min in isocratic elution mode. Nucleotides were detected at 260 nm. Analytical validation parameters were evaluated. The RSD values for intraday and interday repeatability for retention time and peak area were <2.4 and 4.2%, respectively. The method linearity was good (R(2) < 0.9995) for the studied compounds. LOD and limit of quantitation were 0.25 and 0.50 μg/mL, respectively. The method was applied to the determination of nucleotides in infant formula, subjected to a centrifugal ultrafiltration process, prior their analysis. The amounts found were in agreement to the labeled contents.
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Affiliation(s)
- María Mateos-Vivas
- Istituto di Metodologie Chimiche, Consiglio Nazionale delle Ricerche, Monterotondo, Italy.,Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Ciencias Químicas, University of Salamanca, Salamanca, Spain
| | - Salvatore Fanali
- Istituto di Metodologie Chimiche, Consiglio Nazionale delle Ricerche, Monterotondo, Italy
| | - Encarnacíon Rodríguez-Gonzalo
- Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Ciencias Químicas, University of Salamanca, Salamanca, Spain
| | - Rita Carabias-Martínez
- Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Ciencias Químicas, University of Salamanca, Salamanca, Spain
| | - Zeineb Aturki
- Istituto di Metodologie Chimiche, Consiglio Nazionale delle Ricerche, Monterotondo, Italy
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Mirabelli MF, Wolf JC, Zenobi R. Pesticide analysis at ppt concentration levels: coupling nano-liquid chromatography with dielectric barrier discharge ionization-mass spectrometry. Anal Bioanal Chem 2016; 408:3425-34. [DOI: 10.1007/s00216-016-9419-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Revised: 01/25/2016] [Accepted: 02/11/2016] [Indexed: 10/22/2022]
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16
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Hu SW, Chen S. A Multipurpose Lignin-based Adsorbent for Metallic Ions, Nanoparticles and Various Organophosphate Pesticides in Hexane. J CHIN CHEM SOC-TAIP 2015. [DOI: 10.1002/jccs.201400299] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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17
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Groskreutz SR, Weber SG. Quantitative evaluation of models for solvent-based, on-column focusing in liquid chromatography. J Chromatogr A 2015. [PMID: 26210110 DOI: 10.1016/j.chroma.2015.07.038] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
On-column focusing or preconcentration is a well-known approach to increase concentration sensitivity by generating transient conditions during the injection that result in high solute retention. Preconcentration results from two phenomena: (1) solutes are retained as they enter the column. Their velocities are k'-dependent and lower than the mobile phase velocity and (2) zones are compressed due to the step-gradient resulting from the higher elution strength mobile phase passing through the solute zones. Several workers have derived the result that the ratio of the eluted zone width (in time) to the injected time width is the ratio k2/k1, where k1 is the retention factor of a solute in the sample solvent and k2 is the retention factor in the mobile phase (isocratic). Mills et al. proposed a different factor. To date, neither of the models has been adequately tested. The goal of this work was to evaluate quantitatively these two models. We used n-alkyl esters of p-hydroxybenzoic acid (parabens) as solutes. By making large injections to create obvious volume overload, we could measure accurately the ratio of widths (eluted/injected) over a range of values of k1 and k2. The Mills et al. model does not fit the data. The data are in general agreement with the factor k2/k1, but focusing is about 10% better than the prediction. We attribute the extra focusing to the fact that the second, compression, phenomenon provides a narrower zone than that expected for the passage of a step gradient through the zone.
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Affiliation(s)
- Stephen R Groskreutz
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, USA
| | - Stephen G Weber
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, USA.
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18
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Long Q, Li H, Zhang Y, Yao S. Upconversion nanoparticle-based fluorescence resonance energy transfer assay for organophosphorus pesticides. Biosens Bioelectron 2014; 68:168-174. [PMID: 25569873 DOI: 10.1016/j.bios.2014.12.046] [Citation(s) in RCA: 140] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Revised: 12/18/2014] [Accepted: 12/20/2014] [Indexed: 12/25/2022]
Abstract
This paper reports a novel nanosensor for organophosphorus pesticides based on the fluorescence resonance energy transfer (FRET) between NaYF4:Yb,Er upconversion nanoparticles (UCNPs) and gold nanoparticles (AuNPs). The detection mechanism is based on the facts that AuNPs quench the fluorescence of UCNPs and organophosphorus pesticides (OPs) inhibit the activity of acetylcholinesterase (AChE) which catalyzes the hydrolysis of acetylthiocholine (ATC) into thiocholine. Under the optimized conditions, the logarithm of the pesticides concentration was proportional to the inhibition efficiency. The detection limits of parathion-methyl, monocrotophos and dimethoate reached 0.67, 23, and 67 ng/L, respectively. Meanwhile, the biosensor shows good sensitivity, stability, and could be successfully applied to detection of OPs in real food samples, suggesting the biosensor has potentially extensive application clinic diagnoses assays.
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Affiliation(s)
- Qian Long
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China
| | - Haitao Li
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China
| | - Youyu Zhang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China.
| | - Shouzhuo Yao
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China
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19
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Fanali C, Dugo L, Dugo P, Mondello L. Capillary-liquid chromatography (CLC) and nano-LC in food analysis. Trends Analyt Chem 2013. [DOI: 10.1016/j.trac.2013.05.021] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Yi Y, Zhu G, Liu C, Huang Y, Zhang Y, Li H, Zhao J, Yao S. A Label-Free Silicon Quantum Dots-Based Photoluminescence Sensor for Ultrasensitive Detection of Pesticides. Anal Chem 2013; 85:11464-70. [DOI: 10.1021/ac403257p] [Citation(s) in RCA: 166] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yinhui Yi
- Key
Laboratory of Chemical Biology and Traditional Chinese Medicine Research
(Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
| | - Gangbing Zhu
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Chang Liu
- Key
Laboratory of Chemical Biology and Traditional Chinese Medicine Research
(Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
| | - Yan Huang
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Youyu Zhang
- Key
Laboratory of Chemical Biology and Traditional Chinese Medicine Research
(Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
| | - Haitao Li
- Key
Laboratory of Chemical Biology and Traditional Chinese Medicine Research
(Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
| | - Jiangna Zhao
- Key
Laboratory of Chemical Biology and Traditional Chinese Medicine Research
(Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
| | - Shouzhuo Yao
- Key
Laboratory of Chemical Biology and Traditional Chinese Medicine Research
(Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
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21
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Marques SM, da Silva JCGE. Quantitative analysis of organophosphorus pesticides in freshwater using an optimized firefly luciferase-based coupled bioluminescent assay. LUMINESCENCE 2013; 29:378-85. [DOI: 10.1002/bio.2556] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 05/23/2013] [Accepted: 05/26/2013] [Indexed: 11/10/2022]
Affiliation(s)
- SM Marques
- Centro de Investigação em Química da Universidade do Porto (CIQ-UP), Department of Chemistry and Biochemistry; University of Porto; Porto Portugal
| | - JCG Esteves da Silva
- Centro de Investigação em Química da Universidade do Porto (CIQ-UP), Department of Chemistry and Biochemistry; University of Porto; Porto Portugal
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22
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Jin H, Liu Y, Wei M. Determination of Organophosphorus Pesticides Based on BDD Electrode Modified with Au/chitosan Fiber. J CHIN CHEM SOC-TAIP 2012. [DOI: 10.1002/jccs.201200241] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Highly sensitive colorimetric detection of organophosphate pesticides using copper catalyzed click chemistry. Talanta 2012. [PMID: 23200365 DOI: 10.1016/j.talanta.2012.10.016] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly sensitive colorimetric detection of organophosphate pesticides (OPs) was developed using Cu (I)-catalyzed click chemistry as the colorimetric signal amplification process between the acetylcholine esterase-acetylthiocholine system (AChE-ATCl) and azide- terminal alkyne-functionalized Au NPs as the colorimetric probe. It was demonstrated that the involvement of Cu (I)-catalyzed click chemistry allowed greatly improved colorimetric sensitivity for OPs detection based on the indirect modulation of click chemistry-induced Au NPs aggregation by the AChE-ATCl system. Paraoxon as the model OPs in the concentration range from 10(-6) to 10(-4)g/L can be directly detected using the naked-eye-based colorimetric assay without the aid of any complex instruments. The results for paraoxon detection in spiked apple juice were found to be in good agreement with that obtained by the conventional UV-vis spectroscopy. This simple and reliable assay would greatly improve the public safety and environmental protection in an on-site and real-time detection format.
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24
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Andreu V, Picó Y. Determination of currently used pesticides in biota. Anal Bioanal Chem 2012; 404:2659-81. [PMID: 22918537 DOI: 10.1007/s00216-012-6331-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2012] [Revised: 07/16/2012] [Accepted: 08/03/2012] [Indexed: 01/06/2023]
Abstract
Although pesticides enable control of the quantity and quality of farm products and food, and help to limit diseases in humans transmitted by insects and rodents, they are regarded as among the most dangerous environmental contaminants because of their tendency to bioaccumulate, and their mobility and long-term effects on living organisms. In the past decade, more analytical methods for accurate identification and quantitative determination of traces of pesticides in biota have been developed to improve our understanding of their risk to ecosystems and humans. Because sample preparation is often the rate-determining step in analysis of pesticides in biological samples, this review first discusses extraction and clean-up procedures, after a brief introduction to the classes, and the methods used in the analysis of pesticides in biota. The analytical methods, especially chromatographic techniques and immunoassay-based methods, are reviewed in detail, and their corresponding advantages, limitations, applications, and prospects are also discussed. This review mainly covers reports published since 2008 on methods for analysis of currently used pesticides in biota.
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Affiliation(s)
- Vicente Andreu
- Centro de Investigaciones sobre Desertificación -CIDE, Moncada, Valencia, Spain
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25
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Seebunrueng K, Santaladchaiyakit Y, Srijaranai S. Study on the effect of chain-length compatibility of mixed anionic–cationic surfactants on the cloud-point extraction of selected organophosphorus pesticides. Anal Bioanal Chem 2012; 404:1539-48. [DOI: 10.1007/s00216-012-6209-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Revised: 06/14/2012] [Accepted: 06/18/2012] [Indexed: 10/28/2022]
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26
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Assessing the accuracy of volume averaging effective diffusivity estimates with Brownian dynamics simulations. Chem Eng Sci 2012. [DOI: 10.1016/j.ces.2012.04.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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27
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Development of a Direct Competitive Biomimetic Enzyme-Linked Immunosorbent Assay Based on a Hydrophilic Molecularly Imprinted Membrane for the Determination of Trichlorfon Residues in Vegetables. FOOD ANAL METHOD 2012. [DOI: 10.1007/s12161-012-9366-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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28
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ZHOU H, GAN N, HOU J, LI T, CAO Y. Enhanced Electrochemiluminescence Employed for the Selective Detection of Methyl Parathion Based on a Zirconia Nanoparticle Film Modified Electrode. ANAL SCI 2012; 28:267-73. [DOI: 10.2116/analsci.28.267] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Hankun ZHOU
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering of Ningbo University
| | - Ning GAN
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering of Ningbo University
| | - Jianguo HOU
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering of Ningbo University
| | - Tianhua LI
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering of Ningbo University
| | - Yuting CAO
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering of Ningbo University
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29
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Sun J, Guo L, Bao Y, Xie J. A simple, label-free AuNPs-based colorimetric ultrasensitive detection of nerve agents and highly toxic organophosphate pesticide. Biosens Bioelectron 2011; 28:152-7. [DOI: 10.1016/j.bios.2011.07.012] [Citation(s) in RCA: 120] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 07/05/2011] [Accepted: 07/08/2011] [Indexed: 12/31/2022]
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30
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Gutiérrez Valencia TM, García de Llasera MP. Determination of organophosphorus pesticides in bovine tissue by an on-line coupled matrix solid-phase dispersion–solid phase extraction–high performance liquid chromatography with diode array detection method. J Chromatogr A 2011; 1218:6869-77. [DOI: 10.1016/j.chroma.2011.08.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2011] [Revised: 07/11/2011] [Accepted: 08/05/2011] [Indexed: 10/17/2022]
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31
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Seebunrueng K, Santaladchaiyakit Y, Soisungnoen P, Srijaranai S. Catanionic surfactant ambient cloud point extraction and high-performance liquid chromatography for simultaneous analysis of organophosphorus pesticide residues in water and fruit juice samples. Anal Bioanal Chem 2011; 401:1703-12. [DOI: 10.1007/s00216-011-5214-x] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Accepted: 06/24/2011] [Indexed: 11/29/2022]
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32
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Asensio-Ramos M, D’Orazio G, Hernandez-Borges J, Rocco A, Fanali S. Multi-walled carbon nanotubes–dispersive solid-phase extraction combined with nano-liquid chromatography for the analysis of pesticides in water samples. Anal Bioanal Chem 2011; 400:1113-23. [DOI: 10.1007/s00216-011-4885-7] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2011] [Revised: 03/07/2011] [Accepted: 03/08/2011] [Indexed: 11/28/2022]
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33
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Molaabasi F, Talebpour Z. Enantiomeric discrimination and quantification of the chiral organophosphorus pesticide fenamiphos in aqueous samples by a novel and selective ³¹P nuclear magnetic resonance spectroscopic method using cyclodextrins as chiral selector. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:803-808. [PMID: 21192704 DOI: 10.1021/jf103169p] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A rapid, selective, and accurate quantitative ³¹P nuclear magnetic resonance (³¹P NMR) spectroscopy method was used for the chiral recognition of the racemic organophosphorus pesticide fenamiphos using chiral solvating agents (CSAs). Six neutral cyclodextrins (CDs) (α-CD, β-CD, methyl-β-CD, hydroxyethyl-β-CD, hydroxypropyl-β-CD, and hydroxypropyl-γ-CD) and two anionic CDs (carboxymethyl-β-CD and carboxyethyl-β-CD) were selected for these experiments. The shift displacement values (Δδ), after addition of each of the eight CDs in the highest possible molar ratio to a guest, were recorded. The results showed that β-CD and hydroxypropyl-β-CD were the best chiral solvating agents for the enantiomeric discrimination of fenamiphos. Two-dimension rotating frame nuclear Overhauser spectroscopy (ROESY) was used to investigate the structure of the β-CD-fenamiphos inclusion complex in aqueous solution. To determine the fenamiphos enantiomers, a calibration curve was drawn for two enantiomers over the range of 0.05-0.25 mg mL⁻¹. The limits of detection (S/N = 3) were obtained as 0.0068 and 0.0060 mg mL⁻¹ for fenamiphos enantiomers. The recovery studies were performed on aqueous real samples ranging from 94 to 107% with coefficients of variation of ≤ 9%.
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Affiliation(s)
- Fatemeh Molaabasi
- Department of Chemistry, Faculty of Science, Alzahra University, Vanak, Tehran, Iran
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34
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Multi-Walled Carbon Nanotubes as Matrix Solid-Phase Dispersion Extraction Adsorbent for Simultaneous Analysis of Residues of Nine Organophosphorus Pesticides in Fruit and Vegetables by Rapid Resolution LC–MS–MS. Chromatographia 2011. [DOI: 10.1007/s10337-010-1840-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Van Dyk JS, Pletschke B. Review on the use of enzymes for the detection of organochlorine, organophosphate and carbamate pesticides in the environment. CHEMOSPHERE 2011; 82:291-307. [PMID: 21055790 DOI: 10.1016/j.chemosphere.2010.10.033] [Citation(s) in RCA: 211] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Revised: 10/05/2010] [Accepted: 10/11/2010] [Indexed: 05/03/2023]
Abstract
Pesticides are released intentionally into the environment and, through various processes, contaminate the environment. Three of the main classes of pesticides that pose a serious problem are organochlorines, organophosphates and carbamates. While pesticides are associated with many health effects, there is a lack of monitoring data on these contaminants. Traditional chromatographic methods are effective for the analysis of pesticides in the environment, but have limitations and prevent adequate monitoring. Enzymatic methods have been promoted for many years as an alternative method of detection of these pesticides. The main enzymes that have been utilised in this regard have been acetylcholinesterase, butyrylcholinesterase, alkaline phosphatase, organophosphorus hydrolase and tyrosinase. The enzymatic methods are based on the activation or inhibition of the enzyme by a pesticide which is proportional to the concentration of the pesticide. Research on enzymatic methods of detection, as well as some of the problems and challenges associated with these methods, is extensively discussed in this review. These methods can serve as a tool for screening large samples which can be followed up with the more traditional chromatographic methods of analysis.
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Affiliation(s)
- J Susan Van Dyk
- Department of Biochemistry, Microbiology and Biotechnology, Rhodes University, Grahamstown 6140, South Africa
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36
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Zhang K, Mei Q, Guan G, Liu B, Wang S, Zhang Z. Ligand Replacement-Induced Fluorescence Switch of Quantum Dots for Ultrasensitive Detection of Organophosphorothioate Pesticides. Anal Chem 2010; 82:9579-86. [DOI: 10.1021/ac102531z] [Citation(s) in RCA: 181] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Kui Zhang
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China, and Department of Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, China
| | - Qingsong Mei
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China, and Department of Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, China
| | - Guijian Guan
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China, and Department of Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, China
| | - Bianhua Liu
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China, and Department of Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, China
| | - Suhua Wang
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China, and Department of Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, China
| | - Zhongping Zhang
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China, and Department of Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, China
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37
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Determination of organophosphorous pesticides in water using in-syringe ultrasound-assisted emulsification and gas chromatography with electron-capture detection. J Chromatogr A 2010; 1217:5043-9. [DOI: 10.1016/j.chroma.2010.06.006] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2010] [Revised: 05/30/2010] [Accepted: 06/01/2010] [Indexed: 11/18/2022]
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38
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García-Villalba R, Carrasco-Pancorbo A, Zurek G, Behrens M, Bäßmann C, Segura-Carretero A, Fernández-Gutiérrez A. Nano and rapid resolution liquid chromatography-electrospray ionization-time of flight mass spectrometry to identify and quantify phenolic compounds in olive oil. J Sep Sci 2010; 33:2069-78. [DOI: 10.1002/jssc.201000184] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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39
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Coupling capillary electrochromatography with mass spectrometry by using a liquid-junction nano-spray interface. J Chromatogr A 2010; 1217:4079-86. [DOI: 10.1016/j.chroma.2009.11.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2009] [Revised: 09/16/2009] [Accepted: 11/02/2009] [Indexed: 11/23/2022]
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40
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Chen J, Duan C, Guan Y. Sorptive extraction techniques in sample preparation for organophosphorus pesticides in complex matrices. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:1216-25. [DOI: 10.1016/j.jchromb.2010.02.031] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2009] [Revised: 02/25/2010] [Accepted: 02/27/2010] [Indexed: 10/19/2022]
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41
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Validation of a nanoliquid chromatography–tandem mass spectrometry method for the identification and the accurate quantification by isotopic dilution of glutathionylated and cysteinylated precursors of 3-mercaptohexan-1-ol and 4-mercapto-4-methylpentan-2-one in white grape juices. J Chromatogr A 2010; 1217:1626-35. [DOI: 10.1016/j.chroma.2010.01.031] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2009] [Revised: 01/05/2010] [Accepted: 01/08/2010] [Indexed: 11/22/2022]
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42
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Asensio-Ramos M, Hernández-Borges J, Rocco A, Fanali S. Food analysis: A continuous challenge for miniaturized separation techniques. J Sep Sci 2009; 32:3764-800. [DOI: 10.1002/jssc.200900321] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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