建立了鸡肉中残留的环丙胺嗪及其代谢物三聚氰胺的气相色谱-质谱(GC-MS)检测方法.样品经酸化的乙腈-水溶液提取、二氯甲烷去脂、混合型的阳离子交换(MCX)固相萃取柱净化、N,O-双三甲基硅基-三氟乙酰胺(BSTFA)衍生化后进行GC-MS测定.环丙胺嗪采用外标法定量,三聚氰胺以三聚氰胺-15N3为内标定量.结果表明,环丙胺嗪与三聚氰胺的线性范围均为100~1 000 μg/L,定量限为20 μg/kg.在20,40,80 μg/kg 3个添加浓度下目标化合物的平均回收率为75% ~110% ,批内、批间相对标准偏差分别小于10%和15% .该方法样品前处理简单,测定灵敏度高,定性准确,选择性好,可实现鸡肉中环丙胺嗪与三聚氰胺残留的同时测定.
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