速收除草剂在大豆及土壤中的残留动态  

Study on the Residual Dynamics of Flumioxazin in Soybean and Soil

作　　者：逯忠斌[1] 王岩[1] 于萍 刘伊玲[1] 徐威[1] 

机构地区：[1]吉林农业大学农商学院,吉林长春130118

出　　处：《色谱》2000年第2期145-147,共3页Chinese Journal of Chromatography

基　　金：农业部农药检定所资助

摘　　要：采用 Zorbax SIL色谱柱、以二氯甲烷 -甲醇为流动相的高效液相色谱法 ,测定了速收除草剂在大豆田土壤和大豆上的残留动态 ,建立了样品前处理方法和分析方法。速收在土壤、青豆和大豆籽粒的添加回收率分别为84.82 %～ 85 .63 % ,88.79%～ 94.0 0 %和 93 .70 %～ 94.48%。速收在土壤中的半衰期 (t1 / 2 )为 1 0 .0～ 1 0 .5 d,降解速度较慢 ,但在收获期的土壤、青豆 (用药后 80～ 85 d)和大豆籽粒中均未检出 ,说明其残留污染性很小 ,可以在大豆田安全使用。The residual dynamics of flumioxazin in soil and soybean were determined with HPLC, using a Zorbax SIL column and methylene dichloride\|methanol (99.5∶0.5, V/V) as mobile phase. A method for pretreatment of samples and analysis was established. Recoveries of flumioxazin in soil, green soybean and soybean were 84.82%\|85.63%, 88.79%\|94.00% and 93.70%\|94.48%, respectively. Flumioxazin degrades relatively slowly and its half\|life in soil was 10.0\|10.5 days, but in the soil, green soybean and soybean residual flumioxazin was not detected. The results showed that the residual pollution of flumioxazin is negligible, so the application of flumioxazin is safe for the soil and soybean.

关 键 词：高效液相色谱法 大豆 残留动态 速收除草剂 土壤 

分 类 号：TQ457.2[化学工程—农药化工] TQ450.263