1 范围本标 准 规 定了韭菜中7种农药的残留量测定方法。本标 准 适 用于韭菜中甲胺磷、甲拌磷、久效磷、对硫磷、甲基异柳磷、毒死蝉、峡喃丹的残留分析,其*低检出浓度分别为(mg/kg);0.01 ,0.01 ,0.03 ,0.02 ,0.01 ,0.02 ,0.04,2 原理样品 中 农 药用有机溶剂提取,经柱层析净化去除干扰物,用气相色谱仪氮磷检测器检测,根据色谱峰的保留时间定性,外标法定量。