建立了生姜中215种农药多残留测定的液相色谱-电喷雾串联质谱(LC-ESI-MS/MS)方法.样品用1%醋酸-乙腈溶液均质提取,经Sep-Pak Vac固相萃取柱净化,乙腈-甲苯(3∶1, v/v)洗脱,旋转蒸发浓缩至约0.5 mL后,于室温氮气吹干,用乙腈-水(3∶2, v/v)溶解,以电喷雾电离串联质谱在正离子多反应监测(MRM)模式下进行测定.在定量限水平进行添加回收率实验,方法的回收率范围为68.1% ~132.6% ,其中回收率在70% ~120%的占94.4% ,相对标准偏差(RSD)范围为0.4% ~25.0% .方法的检出限(S/N=3)和定量限(S/N=10)范围分别为0.01~70.45 μg/L 和0.04~234.84 μg/L.该方法操作简便,灵敏度、准确度和精密度均符合农药多残留检测技术要求,适用于生姜中215种农药多残留的快速测定.
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