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[目的]建立烟叶中拟除虫菊酯类杀虫剂多残留的固相萃取-气相色谱检测方法。[方法]烟叶样品经正己烷-乙酸乙酯超声提取、Florisil固相萃取柱净化后,用气相色谱电子捕获检测器检测。[结果]7种拟除虫菊酯类杀虫剂在0.1、0.5、1.0 mg/kg三个加标水平上的回收率为85.32%～101.21%,相对标准偏差为2.97%～4.88%,检出限为0.003～0.005 mg/kg。[结论]该方法灵敏准确,适用于烟叶中拟除虫菊酯类杀虫剂多残留分析。
[Objective] The research aimed to establish a method for the determination of pyrethroid insecticides residues in tobacco by solid-phase extraction and gas chromatography. [Method] The tobacco leaf samples were extracted by n-hexane-ethyl acetate and cleaned up by Florisil solid phase extraction column. The samples were detected by gas chromatography electron capture detector. [Result] The recoveries of seven pyrethroid insecticides at the three spiked levels of 0.1, 0.5 and 1.0 mg / kg were 85.32% ~ 101.21% and the relative standard deviations were 2.97% ~ 4.88%. The detection limits 0.003 ~ 0.005 mg / kg. [Conclusion] The method was sensitive and accurate and suitable for the analysis of pyrethroid insecticides residues in tobacco leaves.