气相色谱测定稻米中农药残留的净化处理方法的比较研究  

Comparative study on different cleanup methods for detormination of pesticides residue in rice by GC/

作　　者：杨小弟[1] 吴运军[1] 吴勇勇[1] 

机构地区：[1]皖南医学院

出　　处：《中国食品卫生杂志》1999年第4期3-6,共4页Chinese Journal of Food Hygiene

摘　　要：为有效地用气相色谱法监测稻米中的农药残留量，改进提取及净化方法，向稻米试样中加入１２种广泛使用的有机氯和５种有机氮磷农药，然后测定用不同净化处理方法的回收率。这些处理方法是标准硅酸镁载体柱法、短硅酸镁载体柱法、碳纤维载体柱法和硅胶Ｇ载体柱法。结果显示，用一步正己烷提取，硅酸镁纯化色谱程序，然后用气相色谱———电子捕俘器能有效地测定稻米中有机氯农药和部分氮磷农药的含量。Twelve kinds of chlorinated pesticide and five organnonitrogen phosphirya pesticide affixed in rice samples were determinated by Gas Chormatography(GC) under different deanup methods in order to improve the efficienay of GC determination of pesticides residue.The cleanup methods were as follows:standard florisil column,short florisil column,cellulose larbon column and silica gel G column.Itis concluded that GC based on:extraction (hexane);deanup(florisil xolumn);and detection by dectron capture detector(ECD) can effectively detrminate the pesticide residue in rice.

关 键 词：农药残留量 稻(米) 色谱法.气相 

分 类 号：R155.5[医药卫生—营养与食品卫生学]