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目的研究同时测定蔬菜中的百菌清,甲氰菊酯,氯氰菊酯及溴氰菊酯类农药残留方法。方法样品中的农药残留经溶剂提取后,采用固相萃取技术分离、净化,用气相色谱分析,外析法定量。结果几种组份的分离效果好,呈好的线性关系,相关系数大于>0.995,回收率在82%～105%之间,检出限符合实验要求。结论该方法灵敏度较高,且精密度和准确率较高,同时可以测定蔬菜的百菌清,甲氰菊酯,氯氰菊酯、溴氰酯类农药残留获得结果满意。
Objective To study the simultaneous determination of chlorothalonil, fenpropathrin, cypermethrin and deltamethrin pesticide residues in vegetables. Methods The pesticide residues in the sample were extracted by solvent and separated by solid-phase extraction. Purification was performed by gas chromatography and by external analysis. Results The separation efficiency of several components was good and the linearity was good. The correlation coefficient was> 0.995, the recovery was between 82% and 105%, and the detection limit was in line with the experimental requirements. Conclusion The method has high sensitivity and high precision and accuracy, and can be used to determine the residues of chlorothalonil, fenpropathrin, cypermethrin and cyanogen bromide pesticides in vegetables.