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Simultaneous determination of 131 pesticides in tea by on-line GPC-GC-MS/MS using graphitized multi-walled carbon nanotubes as dispersive solid phase extraction sorbent. 2019

Bingqi Zhu, and Xiaoying Xu, and Jinwen Luo, and Shaoqiang Jin, and Wanqin Chen, and Zhu Liu, and Chunxia Tian
College of Medical Technology, Zhejiang Chinese Medical University, Hangzhou 310000, China. Electronic address: bingqi_zhu@hotmail.com.

A rapid and sensitive method was developed to determine 131 pesticides in tea by on-line gel permeation chromatography-gas chromatography tandem mass spectrometer (on-line GPC-GC-MS/MS) using graphitized multi-walled carbon nanotubes (MWCNTs) as dispersive solid phase extraction (DSPE) sorbent in sample pretreatment. Sample clean-up performance of various functionalized MWCNTs and their influences to recoveries were investigated. In the method validation, good linearity correlation coefficients (R2) were obtained, which were higher than 0.99 for all pesticides. The percent recoveries were 78.2%-113.9% at the spiked concentration levels of 20, 50 and 200 µg/kg with relative standard deviations (RSDs, n = 6) lower than 15.8%. Limits of detections (LODs) were in the range of 0.5-5.0 µg/kg. This method is simple and fast with relatively high sensitivity and can achieve the requirements of pesticides analysis.

UI MeSH Term Description Entries
D008401 Gas Chromatography-Mass Spectrometry A microanalytical technique combining mass spectrometry and gas chromatography for the qualitative as well as quantitative determinations of compounds. Chromatography, Gas-Liquid-Mass Spectrometry,Chromatography, Gas-Mass Spectrometry,GCMS,Spectrometry, Mass-Gas Chromatography,Spectrum Analysis, Mass-Gas Chromatography,Gas-Liquid Chromatography-Mass Spectrometry,Mass Spectrometry-Gas Chromatography,Chromatography, Gas Liquid Mass Spectrometry,Chromatography, Gas Mass Spectrometry,Chromatography, Mass Spectrometry-Gas,Chromatography-Mass Spectrometry, Gas,Chromatography-Mass Spectrometry, Gas-Liquid,Gas Chromatography Mass Spectrometry,Gas Liquid Chromatography Mass Spectrometry,Mass Spectrometry Gas Chromatography,Spectrometries, Mass-Gas Chromatography,Spectrometry, Gas Chromatography-Mass,Spectrometry, Gas-Liquid Chromatography-Mass,Spectrometry, Mass Gas Chromatography,Spectrometry-Gas Chromatography, Mass,Spectrum Analysis, Mass Gas Chromatography
D010573 Pesticide Residues Pesticides or their breakdown products remaining in the environment following their normal use or accidental contamination. Pesticide Residue,Residue, Pesticide,Residues, Pesticide
D010575 Pesticides Chemicals used to destroy pests of any sort. The concept includes fungicides (FUNGICIDES, INDUSTRIAL); INSECTICIDES; RODENTICIDES; etc. Pesticide
D002850 Chromatography, Gel Chromatography on non-ionic gels without regard to the mechanism of solute discrimination. Chromatography, Exclusion,Chromatography, Gel Permeation,Chromatography, Molecular Sieve,Gel Filtration,Gel Filtration Chromatography,Chromatography, Size Exclusion,Exclusion Chromatography,Gel Chromatography,Gel Permeation Chromatography,Molecular Sieve Chromatography,Chromatography, Gel Filtration,Exclusion Chromatography, Size,Filtration Chromatography, Gel,Filtration, Gel,Sieve Chromatography, Molecular,Size Exclusion Chromatography
D013662 Tea The infusion of leaves of CAMELLIA SINENSIS (formerly Thea sinensis) as a beverage, the familiar Asian tea, which contains CATECHIN (especially epigallocatechin gallate) and CAFFEINE. Black Tea,Green Tea,Black Teas,Green Teas,Tea, Black,Tea, Green,Teas, Black,Teas, Green
D015203 Reproducibility of Results The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results. Reliability and Validity,Reliability of Result,Reproducibility Of Result,Reproducibility of Finding,Validity of Result,Validity of Results,Face Validity,Reliability (Epidemiology),Reliability of Results,Reproducibility of Findings,Test-Retest Reliability,Validity (Epidemiology),Finding Reproducibilities,Finding Reproducibility,Of Result, Reproducibility,Of Results, Reproducibility,Reliabilities, Test-Retest,Reliability, Test-Retest,Result Reliabilities,Result Reliability,Result Validities,Result Validity,Result, Reproducibility Of,Results, Reproducibility Of,Test Retest Reliability,Validity and Reliability,Validity, Face
D052616 Solid Phase Extraction An extraction method that separates analytes using a solid phase and a liquid phase. It is used for preparative sample cleanup before analysis by CHROMATOGRAPHY and other analytical methods. Extraction, Solid Phase,Extractions, Solid Phase,Solid Phase Extractions
D057230 Limit of Detection Concentration or quantity that is derived from the smallest measure that can be detected with reasonable certainty for a given analytical procedure. Limits of Detection,Detection Limit,Detection Limits
D037742 Nanotubes, Carbon Nanometer-sized tubes composed mainly of CARBON. Such nanotubes are used as probes for high-resolution structural and chemical imaging of biomolecules with ATOMIC FORCE MICROSCOPY. Buckytubes,Carbon Nanotubes,Nanoribbons,Buckytube,Carbon Nanotube,Nanoribbon,Nanotube, Carbon

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