Detection of dichlorvos residues in ham by QuEChERS-gas chromatography-mass spectrometry

Abstract

Abstract: Objective By using QuEChERS-gas chromatography-mass spectrometry（GC-MS）,to establish an analytical method for the determination of dichlorvos in ham. Methods The crushed ham samples were extracted with acetonitrile,and purified by QuEChERS. The dichlorvos in ham was analyzed by gas chromatography-mass spectrometry under Full Scan and SIM（single ion monitoring） mode. Results The resolution of dichlorvos in ham was good,and the linear relationships was good in the range of 0.01-1.00 μg/mL with the correlation coefficient（r） was 0.999 9. The limit of detection was 0.7 μg/kg,and the limit of quantitation was 2 μg/kg. When the addition concentration was 5-50 μg/kg,the recovery of standard addition was 85.2%-105.4%,and the relative standard deviation was 2.68%-7.41%. 95 ham samples were tested by this method,the dichlorvos was detected in 24 samples,the detection rate was 25.3%,and the detection concentration of positive samples was 14.82-157.53 μg/kg. Conclusion The method is simple in operation,stable and reproducible,and can be used for the qualitative and quantitative determination of dichlorvos in ham.

Key words: QuEChERS, gas chromatography-mass spectrometry, ham, dichlorvos

CLC Number:

R115

ZHU Peng-jing, LIU Jian-hui, LI Yan-sheng, ZHANG Ting, DUAN Yi-hong. Detection of dichlorvos residues in ham by QuEChERS-gas chromatography-mass spectrometry. [J]OCCUPATION AND HEALTH, 2023, 39(9): 1197-1201.

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