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QuEChERS-气相色谱法同时测定果蔬中12种有机氯和拟除虫菊酯类农药残留

Chinese Journal of Health Laboratory Technology(2016)

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Abstract
目的 建立QuEChERS-气相色谱法同时测定果蔬中12种有机氯及拟除虫菊酯类农药残留的方法.方法 样品经1%冰乙酸-乙腈均质提取,N-丙基乙二胺(PSA)、ODSC18粉和石墨化碳黑(GCB)粉混合净化后,采用DB-5毛细管柱进行分离,μECD检测器检测,气相色谱法测定,外标法定量.结果 12种农药的浓度为0.025 μg/ml~2.5μg/ml时,线性关系良好,相关系数(r) ≥0.992.在0.05 mg/kg、0.25 mg/kg、0.50 mg/kg 3种添加水平下,方法的平均回收率为80.21%~113.20%,相对标准偏差(RSD)为3.21%~12.67% (n =6),检出限(LOD)为0.000 2 mg/kg~0.001 0 mg/kg.结论 本方法操作简便、定量准确、快速,可满足果蔬中12种有机氯及拟除虫菊酯类农药残留的检测需求.
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Key words
QuEChERS,Gas chromatography,Organochlorine pesticide,Pyrethroid pesticide,Fruits and vegetables
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