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[目的]建立一种加速溶剂萃取(ASE)-气相色谱(GC)法同时测定蔬菜中20种有机磷类农药残留量的新方法。[方法]样品用V(二氯甲烷)∶V(丙酮)=1∶1提取,提取液经CARB-NH2固相萃取柱净化后,采用GC-氮磷检测器(GC-NPD)进行检测。[结果]20种有机磷农药的加标回收率均在90%以上,RSD在0.25%~3.6%间。[结论]采用ASE-GC法测定蔬菜中有机磷农药多残留较传统液液萃取法更快速,回收率高且稳定,是一种良好的测定方法。
[Objective] The research aimed to establish a new method for simultaneous determination of 20 organophosphorus pesticide residues in vegetables by accelerated solvent extraction (ASE) -chromatography (GC). [Method] The sample was extracted with V (dichloromethane): V (acetone) = 1: 1. The extract was purified by CARB-NH2 solid phase extraction column and detected by GC-NPD. [Result] The spiked recoveries of 20 kinds of organophosphorus pesticides were over 90% with RSD between 0.25% and 3.6%. [Conclusion] It is a good method to determine the residues of organophosphorus pesticide residues in vegetables by ASE-GC method, which is faster, more stable and more stable than traditional liquid-liquid extraction.