Determination of Four Chiral Pesti-cides in Soil by QuEChERS-Ultra Per-formance Liquid Chromatog-raphy-Tandem Mass Spectromet
YAO Xiaoshan, YANG Fangxing, LIU Weiping, JIN Shiwei1. College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, Hubei, China; 2. College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, Zhejiang, China
The enantiomer residues of metalaxyl, napropamide, triticonazole and metconazole were detected in soil by QuEChERS-ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The soil sample was extracted with acetonitrile containing 1% acetic acid and purified using QuEChERS method. Quantitative analysis for the enan-tiomers of these four chiral pesticides was performed in MS in multi-response monitoring (MRM) mode by external standard method. All enantiomers showed good linearity in the range of 0.5 to 50 µg/L. The average recoveries of enantiomers in soil were 81.74% to 105.79% with relative standard deviations (RSDs) from 3.69% to 7.86%. The method quantitative limit (MQL) was 5.3-30.3 ng/kg. The method can be used for rapid screening and determination of chiral pesticides in soil.
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