建立了高效液相色谱-串联质谱测定植物产品(大豆、大米、小麦、蔬菜、水果、茶叶等)、动物肉类产品、水产品、板栗、蜂蜜等产品中草甘膦(PMG)及其主要代谢物氨甲基膦酸(AMPA)残留量的方法.样品经水提取后用二氯甲烷除去其中的脂肪,再经阳离子交换柱(CAX)净化,用9-芴基甲基氯仿(FMOC-Cl)衍生化,采用多反应监测技术所确定的定性离子对其进行定性,同位素内标法定量.方法的定量检测低限为0.05 mg/kg,线性范围为0.20～10 μg/L,各种基质下PMG和AMPA的平均加标回收率为80.0%～104%,相对标准偏差为6.7%～18.2%.
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