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| Determination of 31 Organophosphorous Pesticide Residues in Fruits by Gas Chromatography with QuEChERS Sample Preparation |
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| DOI： |
| KeyWord:QuEChERS gas chromatography(GC) fruits organophosphorous pesticide |
| Author | Institution |
| XU Guo-feng,NIE Ji-yun*,LI Hai-fei,YAN Zhen，LI Jing |
中国农业科学院果树研究所，农业部果品质量安全风险评估实验室兴城 |
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| Abstract: |
| A method of QuEChERS sample preparation was optimized and the QuEChERS-GC method for simultaneous analysis of 31 organophosphorous pesticide residues in fruits were established in this study.The samples were extracted with acetonitrile，and salted out with sodium chloride.The extracts were cleaned up by dispersive solid phase extraction using C18 and magnesium sulfate as sorbents，then determined by GC/FPD with matrix-matched standards procedure.The external standard method was used for quantitative analysis.The results showed that the correlation coefficients of linear equations(r2) were in the range of 0.990 3-0.999 9.The recoveries of 31 organophosphorus pesticides in various spiked levels ranged from 81.7% to 120.7%，with RSDs of 0.4%-14.7%.The limits of detection(LOD) were in the range of 0.4-6 μg?kg-1.The method showed the advantages of simplicity，rapidness，sensitivity and low consumption.It could meet the demands for the simultaneous determination of multi-residue organophosphorous pesticides in fruits. |
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