建立了河豚鱼、鳗鱼和对虾中191种农药多残留的气相色谱-质谱分析方法.样品用乙酸乙酯-环己烷(体积比为1∶1)均质提取,凝胶渗透色谱净化,收集26~44 min的流出液并进行在线浓缩,通过气相色谱柱(DB-1701)分离后在选择离子监测(SIM)模式下进行质谱检测.分别以最低定量限和4倍最低定量限为添加浓度对河豚鱼、鳗鱼和对虾样品进行了两个水平的添加回收率实验,方法的回收率范围为50.2% ~120% ,其中89.5%的农药的回收率为70% ~120% ,相对标准偏差范围为0.6% ~21.6% .方法的最小检出限和最低定量限范围分别为0.002~0.3 mg/kg 和0.007~1.2 mg/kg .该方法的灵敏度、准确度和精密度均符合农药多残留检测的技术要求,适用于河豚鱼、鳗鱼和对虾等动物源性水产品中多种农药残留的检测.
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