块茎类蔬菜中拟除虫菊酯类农药残留检测  

Detection of pyrethroid pesticide residue in tuber vegetables

作　　者：王新华[1] 卢文明[1] 舒黎晔[1] 

机构地区：[1]浙江省奉化市疾病预防控制中心,浙江奉化315500

出　　处：《中国卫生检验杂志》2009年第5期1017-1018,共2页Chinese Journal of Health Laboratory Technology

摘　　要：目的：建立简便、灵敏、准确的气相色谱-电子捕获检测器（GC-ECD）测定块茎类蔬菜中8种拟除虫菊酯类农药残留的检测方法。方法：样品粉碎后,采用乙腈为提取溶剂,在超声波中提取30 min,用弗罗里硅土柱净化提纯。选用石英毛细管柱HP-5（30 m×0.32 mm×0.25μm）作为分析柱,程序升温进行测定。结果：8种拟除虫菊酯类农药分离良好;线性范围为：0.03-0.15μg/ml;定量检测限为：1.4-8.5μg/kg;方法平均回收率为：82.7%-95.2%;标准偏差为：3.3%-7.1%。结论：该法灵敏度高,操作简便,适用于实际样品的测定。Objective：To establish an analytical method for determination of 8 kinds of pyrethroid pesticide residue in tuber vegetables by GC - ECD. Methods： The smashed sample was extracted by acetonitrile using ultrasonic extraction for 30 minutes, purificated by Florisil, determined by HP -5 quartz capillary column with column temperture programe. Results：The 8 kinds of pyrethroid pesticide were separated well. The linear range was 0. 03 - 0. 15 μg/ml and the limit of quantification was 1.4 8.5 μg/kg. The recovery was between 82.7% - 95.2%. RSD was less than 3.3% - 7.1%. Conclusion ： This method is sensitive, fast and accurate. It can be used for determination of the residues of pyrethroid pesticide in tuber vegetables.

关 键 词：拟除虫菊酯类农药 气相色谱 块茎类蔬菜 石英毛细管柱 

分 类 号：O657.71[理学—分析化学]