GC/MS法研究鸡蛋中三聚氰胺的残留

CHINESE JOURNAL OF ANIMAL HUSBANDRY AND VETERINARY MEDICINE(2010)

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Abstract
研究建立了GC/MS测定鸡蛋中三聚氰胺残留的方法.样品以10g/L三氯乙酸溶液提取,Cleanert PCX固相萃取柱净化,50℃水浴中氮气吹干后衍生化.以气相色谱-质谱选择99、171、327、342四个碎片离子进行定性定量分析.三聚氰胺在0.05mg/L~2.5mg/L成线性(R2为0.999),鸡蛋中3种不同添加浓度0.05、0.10和0.50mg/kg下三聚氰胺平均回收率分别为84.71%、88.12%、92.62%,相对标准偏差分别为10.57%、7.12%、6.92%,样品中最低检测限(S/N=3)为0.005mg/kg.
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