QuEChERS-气相色谱-串联质谱法同时测定豇豆中6种菊酯农药残留
CHINA MEASUREMENT & TESTING TECHNOLOGY(2021)
Abstract
建立QuEChERS-气相色谱-串联质谱技术同时测定豇豆中6种菊酯农药(甲氰菊酯、氯氟氰菊酯、氟氯氰菊酯、氯氰菊酯、氟胺氰菊酯、氰戊菊酯)含量的快速检测方法.豇豆样品经乙腈提取,采样QuEChERS法进行净化,目标化合物经TG-5SILMS(30?m×0.25?mm,0.25?μm)色谱柱分离,采用三重串联四级杆选择反应监测模式(selected reaction?monitoring,?SRM)进行定性定量分析,外标法定量.结果表明,6种农药在0.001~0.5?mg/L范围内线性关系良好,相关系数均大于0.99;在3个添加浓度水平(0.01,0.05,0.10?mg/kg)下,平均回收率在89.6%~106.9%之间;5次重复的相对标准偏差在4.0%~11.9%;甲氰菊酯、氟氯氰菊酯和氰戊菊酯的定量限为0.003?mg/kg,氯氟氰菊酯、氯氰菊酯和氟胺氰菊酯的定量限为0.0015?mg/kg.该方法操作简便,结果准确,能满足豇豆中6种菊酯农药残留检测的要求.
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