蔬菜中26种农药残留检测方法的研究

Determination of 26 pesticide residues in vegetables by gas chromatography

目的：本论文旨在建立蔬菜中26种有机磷、有机氯和菊酯等三大类农药残留的固相萃取-毛细管气相色谱的快速检测方法。方法：样品前处理方法在NY/T761-2004的基础上稍做改进,采用双柱、双检测器（FPD、ECD）对蔬菜中26种农药残留进行定性和定量分析。结果：该方法在16 min内能够很好的分离14种有机磷类农药,在17 min内能够很好的分离12种有机氯和菊酯类农药;样品加标回收率（n=3）为85.85%～108.51%,相对标准偏差小于4.79%,最低检出限范围0.06～2 ppb。结论：该方法检测蔬菜农药残留灵敏度高、操作简便。

Objective：A solid -phase extraction and capillary gas chromatographic method has been developed for determining 26 organophosphorus, organochlorine and pyrethroid pesticide residues in vegetables. Methods：Extraction and sample cleanup of pesticide residus according to the state standard measurements NY/T761 -2004, then, the extract was separated by two kinds of columns and detected by FPD and ECD. Results ：The method could separate 14 organophosphorus pesticides and 12 organochlorine and pyrethroid pesticides in 16 rain and 17 rain respectively. The average recoveries for spiked standards （n = 3） were between 85. 85% and 108.51%. Precision （expressed as relative standard deviation） was lower than 4. 79% and the range of limit of detection （LOD） was between 0. 06 and 2 ppb. Conclusion：This procedure for testing vegetable contamination is sensitive and easy to perform.