固相萃取-气相色谱法用于蔬菜中拟除虫菊酯类农药残留的检测研究

Residue Analysis of Pyrethrum Ester Pesticides in Cabbage by SPE-GC

本文建立了固相萃取气相色谱联用技术(SPEGC)用于甘蓝中拟除虫菊酯类农药残留的分析方法。与国家标准方法相比,该法节省了样品前处理的时间和溶剂用量,灵敏度得到提高;氯氰菊酯、氰戊菊酯、甲氰菊酯和三氟氯氰菊酯的检出限分别为10.1μg/L、9.2μg/L、3.6μg/L和2.9μg/L,方法的回收率高,重现性好。SPEGC是农药残留检测中值得推广的一种方法。

This paper focuses on SPE-GC method applied to the determination of pyrethrum ester pesticide residues in cabbage.Compared to the national criterion method,the pretreat-time of samples can be shortened and the volumes of solvent can be saved 50% in the method discussed.Furthermore,the sensitivity can be improved.DL of cypermethrin,fenvalerate,fenpropathrin,and cyhalothrin can reach 10.1 μg/L,9.2 μg/L,3.6 μg/L and 2.9 μg/L,respectively,while the recovery can be heightened to a great degree,especially the recoveries of cypermethrin and fenvalerate haies increased for more than 35%.In addition,it gets a very good reproducibility.So SPE-GC is a method worthy of extending in pesticide residue analysis.