建立了玉米、花生、菠菜、柑橘4种不同类型农产品中甲草胺残留量的检测方法.样品先用丙酮-水(体积比为8:2)提取,经二氯甲烷液-液分配,再用凝胶色谱(GPC)和固相萃取(SPE)去除色素和提取待测物,最后采用气相色谱-质谱测定,外标法定量.甲草胺的添加水平为0.010~0.200 mg/kg时,平均回收率为86.0%~98.2%;相对标准偏差为5.1%~6.7%;方法的测定低限为0.010 mg/kg.
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