气相色谱质谱联用法对农产品中8种种衣剂农药残留的同时测定

Journal of Instrumental Analysis(2008)

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Abstract
应用气相色谱-质谱联用仪(GC-MS)建立了水果、蔬菜、粮谷等农产品中8种种衣剂农药残留的分析测定方法。样品用乙腈提取,通过石墨化碳或C18固相萃取小柱净化,经DB-5ms气相色谱柱分离,电子轰击电离(EI)、选择离子监测模式(SIM)对定量离子和定性离子进行MS测定。标准工作曲线范围0.02~0.5mg/L。样品中添加水平为0.005、0.010和0.020 mg/kg时,回收率为74%~110%;相对标准偏差小于15%。检出限(S/N=3)为0.09~0.77μg/kg。
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Key words
agricultural products,pesticide residue,GC-MS,seed coating reagent
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