固相萃取-气相色谱法检测草莓中农药残留量

Determination of Rganophosphorus Pesticides in Strawberry by GC-SPE

摘要:

建立用气相色谱同时检测草莓中13种有机磷农药残留方法。用乙腈提取，Carbon∕PSA复合固相萃取小柱净化提取液，采用Agilent-1701毛细管柱和GC-FPD检测器进行定量检测。结果表明，13种农药残留的色谱图分离效果较好，线性相关系数均大于0.995，最低检出限在0.0012 mg/kg~0.0082 mg/kg之间，多次试验平均回收率在90.6~105.3 % 之间，RSD 1.28~6.30% 之间。该方法适合草莓中多种农药残留的检测。

Abstract:

A gas chromatography method was established for determination of 13 organophosphorus pesticides in strawberry. The organophosphorus pesticides were homogenated, extracted by acetonitrile and purified by solid phase extraction. The sample solution was analyzed by gas chromatography with Agilent-1701. Good separation for 13 organophosphorus pesticides was achieved using the established method, with correlation coefficients above 0.995. The detection limit was 0.0012~0.0082 mg/kg. The average recoveries of the 13 organophosphorus pesticides were 90.6~105.3% with RSDs of 1.28~6.30%. This method could meet the requirements for the organophosphorus pesticides in strawberry.