毛细管气相色谱法测定蔬菜、水果中20种有机磷农药多残留  

Determination of twenty organophosphates pesticide multi-residues in vegetables and fruits by capillary gas chromatography

作　　者：李四生[1] 李家涛[1] 李昌安[1] 戴震[1] 

机构地区：[1]合肥市疾病预防控制中心,合肥230022

出　　处：《中国卫生检验杂志》2009年第2期318-320,共3页Chinese Journal of Health Laboratory Technology

基　　金：合肥市科研重点项目2007(1004)

摘　　要：目的：建立蔬菜、水果中20种有机磷农药多残留毛细管气相色谱分析方法。方法：样品经搅拌成匀浆后，利用乙腈直接萃取，浓缩，再通过HP-5毛细管柱，FPD气相色谱定性和定量。结果：20种有机磷农药分离效果好，在白菜、黄瓜、黄梨中的3个浓度添加水平，回收率为75．6％～113％，RSD为2．8％～17．4％；在HP-5毛细管柱上最低检出限为0．005～0．087mg／kg，保留时间1．813～16．096min之间。结论：方法操作简便快速，准确度和精密度高，成本低，适合蔬菜、水果中有机磷农药多残留检测分析。Objective：To set up a method for determination of 20 organophosphorus pesticide multi -residues in vegetables and fruits by capillary gas chromatography. Methods：The samples were stirred into homogenate, used acetonitrile to extract the residues,then directly concentrated and injected into gas chromatography with HP -5 Column and flame photometric detector （FPD） for qualification and quantification. Results：The pesticides in vegetables and fruits were separated from each other. The fortified recoveries gained of three spiked levels with 20 organophosphorus pesticide were found 75.6% -113% in cabbage, cu- cumber and yellow pear. The relative standard deviation （RSD） was 2. 8% - 17.4%. The minimum detection limit of the method was 0. 005 -0. 087 mg/kg for HP -5 Column, and the retention time was 1. 813 - 16. 096 min. Conclusion：This method is simple, rapid, good accurate and of high precision and less cost. So it is suitable for the determination of pesticide multi - residues in vegetables and fruits.

关 键 词：毛细管气相色谱 有机磷 农药多残留 蔬菜水果 

分 类 号：O657.7[理学—分析化学]