Determination of 7 Pesticide and Metabolite Residues in Vegetables Using QuEChERS and Liquid Chromatography-Tandem Mass Spectrometry

doi:10.7506/spkx1002-6630-201720034

Abstract

Abstract: A method was developed for the simultaneous determination of 7 pesticide and metabolite residues in vegetables by employing quick, easy, cheap, effective, rugged and safe (QuEChERS) extraction coupled with liquid chromatography triple quadrupole mass spectrometry (LC-MS/MS). Samples were extracted with acetonitrile, and then the extract was purified by dispersive solid phase extraction (SPE) using graphite carbon black (GCB) and C18 sorbent. The analytes were monitored by liquid chromatography-tandem triple quadrupole mass spectrometry in the dynamic multiple reaction monitoring (DMRM) mode, and quantification was carried out by the external standard method with matrix-match standard solution. The recoveries at spiked levels of 10 and 20 μg/kg were in the range from 71.9% to 117.8% and the precision, expressed as relative standard deviation (RSD, n=3), ranged from 0.8% to 9.6% under the selected conditions. The limits of quantification (LOQs) were in the range of 0.2–10 μg/kg. The method proved to be simple, fast, sensitive and useful for the analysis of the 7 pesticides and their metabolite residues in vegetables.

Key words: liquid chromatography-tandem mass spectrometry (LC-MS/MS), vegetables, pesticides and metabolites

CLC Number:

S859.7

WANG Jianhua, GE Minmin, ZHANG Huili, LIN Hong, TANG Zhixu, LI Li. Determination of 7 Pesticide and Metabolite Residues in Vegetables Using QuEChERS and Liquid Chromatography-Tandem Mass Spectrometry[J]. FOOD SCIENCE, 2017, 38(20): 235-241.

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Determination of 7 Pesticide and Metabolite Residues in Vegetables Using QuEChERS and Liquid Chromatography-Tandem Mass Spectrometry

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