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目的:建立一种经济快速测定蔬菜中三氯杀螨醇和拟除虫菊酯农药残留的毛细管气相色谱法。方法:样品用乙腈均质提取,提取液经硅胶柱净化,采用HP-5毛细管柱(30 m×0.25 mm×0.25μm),ECD检测器进行测定。结果:样品的农药添加回收率为67.8%~118.3%。相对标准偏差为3.2%~13.5%。结论:该方法快速、准确、成本低,适用于蔬菜样品中农药多残留的检测。
OBJECTIVE: To establish a rapid and economical method for the rapid determination of dicofol and pyrethroid pesticide residues in vegetables by capillary gas chromatography. Methods: The samples were homogenized with acetonitrile. The extracts were purified by silica gel column and determined by HPCD capillary column (30 m × 0.25 mm × 0.25 μm) and ECD detector. Results: The recoveries of pesticides in samples ranged from 67.8% to 118.3%. The relative standard deviation was 3.2% ~ 13.5%. Conclusion: The method is rapid, accurate and low cost and suitable for the detection of pesticide residues in vegetable samples.