烟叶及土壤中菌核净残留分析方法及消解规律  

Residue Analysis Methods and Degradation Regularity of Dimethachlon in Tobacco Leaves and Soils

作　　者：张亚[1] 何可佳[1] 刘薇[1] 薛正杰[1] 

机构地区：[1]湖南农业大学生物安全科技学院,长沙410128

出　　处：《农药》2009年第9期677-679,共3页Agrochemicals

基　　金：湖南省烟叶专卖局项目(05-03)

摘　　要：提取样品中的菌核净,硅胶层析柱净化,气相色谱配电子捕获检测器(ECD)测定。结果表明:鲜烟叶、土壤中菌核净平均回收率分别为96.80%～98.96%、93.87%～100.78%;相对标准偏差分别为7.77%～8.22%、5.48%～6.69%。菌核净在鲜烟叶中的消解较快,半衰期为7.75d;在土壤中相对较慢,半衰期为15.71d。the dimethachlon residues in tobacco leaves and soil were extracted with acetone, cleaned up on a column of silica, and determined with an electron capture detector （ecD）. the result showed that recoveries were 96.80-98.96% for fresh leaves and 93.87-100.78% for soil respectively, and relative standard deviations （rsD） were 7.77-8.22% and 5.48-6.69% respectively. the degradation rates of dimethachlon were faster in tobacco leaves than in soils, and the degradation half-life times was 7.75 days in tobacco leaves and15.71 days in soils.

关 键 词：烟叶 土壤 菌核净 气相色谱 残留分析 消解规律 

分 类 号：TQ450.263[化学工程—农药化工]