水稻中乙酰甲胺磷及其代谢产物甲胺磷农药残留分析方法

Determination of Residues of Acephate and Its Metabolite in Rice by GC

采用乙腈和水(70∶5,V/V)为溶剂提取水稻中乙酰甲胺磷、甲胺磷,其他采用NY/T761-2008方法,气相色谱法(FPD检测器)进行测定2种农药在糙米中的残留,其添加回收率为78.7%～91.8%,变异系数为5.72%～14.1%,乙酰甲胺磷的最低检出限为0.005mg/kg,甲胺磷的最低检出限为0.01mg/kg。

A method for the determination of acephate and methamidophos residues in rice was developed. The samples were extracted with acetonitrile＋water（70＋5）. Acephate and methamidophos were quantitated by GC with a FPD detector. The average recoveries ranged from 78.7% to 91.8% and the relative standard deviations were from 5.7% to 14.1%.The limit of detection of acephate and methamidophos were 0.005mg/kg and 0.01 mg/kg.