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| High-throughput Rapid Detection of Multi-pesticide Residues in Vegetables and Fruits by Gas Chromatography-Tandem Mass Spectrometry Combined with QuEChERS-Dispersed Liquid-Liquid Microextraction |
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| DOI： |
| KeyWord:QuEChERS dispersive liquid-liquid micro extraction(DLLME) gas chromatography tandem mass spectrometry(GC-MS/MS) multi pesticide residues vegetables and fruits |
| Author | Institution |
| CAO Xiao-yun,CHEN Shu-gan,ZENG Chu-ying,LI Xiu-juan,WANG Lu |
Yantian District Center for Disease Control and Prevention |
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| Abstract: |
| A high sensitivity and throughput method was developed for the simultaneous determination of 152 pesticide residues in vegetables and fruits by gas chromatography tandem mass spectrometry(GC-MS/MS) with QuEChERS-dispersed liquid-liquid microextraction(DLLME).Pesticide residues in vegetables and fruits samples were extracted by QuEChERS method with acetonitrile.Then after centrifugation,the acetonitrile supernatant was added with trace chloroform(CHCl3) for DLLME.The extract was analyzed by(GC-MS/MS) with electron impact ion source(EI) in selective reaction monitoring mode(SRM).Results showed that there were good linear relationships for 152 pesticides including isomers in the range of 5.0-200 μg/L with correlation coefficients above 0.995.The recoveries for the analytes at low,medium and high levels were in the range of 60.6%-119%,with relative standard deviations(RSD,n=6) of 1.5%-20%.The limits of detection and the limits of quantitation were in the ranges of 0.14-2.3 μg/kg and 0.45-7.7 μg/kg,respectively.The method is simple,accurate and sensitive.It is suitable for the high throughput and rapid detection of multi residues in fresh agricultural products such as vegetables and fruits. |
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