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固相萃取-GC法测定桃中联苯菊酯、溴氰菊酯和毒死蜱残留量的研究
翟硕莉,张秀丰
0
(衡水学院;衡水海关)
摘要:
建立用气相色谱同时检测桃中毒死蜱、联苯菊酯和溴氰菊酯三种不同类型的农药残留检测方法。用乙腈提取, Carb∕NH2复合固相萃取小柱净化提取液,采用HP-5毛细管柱分离、GC-ECD进行定量检测。结果表明,三种农药残留的色谱图分离效果较好,线性相关系数均大于0.999,检出限在0.0 031mg/kg~0.0 088 mg/kg之间,多次试验平均回收率在94.8%~100.7%之间,RSD在1.35%~3.25%之间。该方法适合桃中上述三种农药残留的检测。
关键词:    固相萃取  气相色谱  联苯菊酯  溴氰菊酯  毒死蜱
DOI:
投稿时间:2019-02-28修订日期:2019-02-28
基金项目:衡水学院校级课题(2016L058)
Determination of bifenthrin, deltamethrin and chlorpyrifos residues in peach by GC-SPE
,ZHANG Xiufeng
(Hengshui Customs)
Abstract:
To establish a gas chromatography method for determination of chlorpyrifos, bifenthrin and deltamethrin residues in peach. The organophosphorus pesticides were homogenated and extracted by acetonitrile,and evaporator,purified by solid phase extraction.The sample solution was analyzed by GC-ECD with HP-5. The established method of the pesticides were separated each other very well in the chromatogram, with correlation coefficients above 0.999.The detection limit was 0.0031mg/kg~0.0088mg/kg.The average recoveries of the pesticides were 94.8%~100.7%,RSDs were 1.35%~3.25%. This method could meet the requirements for the organophosphorus pesticides in peach.
Key words:  peach  solid phase extraction  GC  bifenthrin  deltamethrin  chlorpyrifos

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