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    固相萃取-气相色谱法测定蔬菜中氨基甲酸酯类农药残留

    SPE-GC Determination of Residual Carbamates Pesticides in Vegetable

    • 摘要: 采用固相萃取法用乙腈作溶剂提取蔬菜中氨基甲酸酯类农药.提取液经氨基柱净化,洗脱液浓缩近干用丙酮定容至1 mL,供气相色谱测定用.在DB-1701毛细管色谱柱上,7种农药达到很好分离并用氮磷检测器进行测定.7种农药的检出限(3S/N)在0.008~0.034 mg·L-1之间.对方法的精密度和回收率作了试验,测得其相对标准偏差(n=6)在1.81%~5.91%之间,回收率在90.0%~112.0%之间.

       

      Abstract: Residual amounts of carbamate pesticides in samples of vegetable were extracted with acetonitrile and purified by sold phase extraction on amino column,concentrated and made up to 1 mL,with acetone which was used for GC determination.By using DB-1701 capillary chromatographic column,7 carbamates pesticides were separated and determined by NPD.The values of detection limit (3S/N) found were in the range of 0.008-0.034 mg·L-1.Precision and recovery of the method were tested,and values of RSD′s (n=6) and of recovery found were in the range of 1.81%-5.91% and 90.0%-112.0% respectively.

       

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