This method is applicable to rapidly determine Methamidophos with GC.Methamidophos in rice is extracted with ethyl acetate to prepare sample solution that dries with sodium sulfate.

• 用无水硫酸钠吸干米饭中水份，再以乙酸乙脂提取样品中甲胺磷，提取液直接进气相色谱仪测定。