仲丁灵在土壤中的消解动态研究  

Degradation Dynamics of Butralin in Soil

作　　者：徐月明[1] 张纪利[1] 郭明程[1] 周清[1] 李保同[1] 

机构地区：[1]江西农业大学农学院,南昌330045

出　　处：《现代农药》2012年第3期33-36,共4页MODERN AGROCHEMICALS

摘　　要：采用气相色谱法建立了仲丁灵在土壤中的残留分析测定方法,并试验了仲丁灵在土壤中的残留消解动态。样品采用丙酮提取,经弗罗里硅土柱净化后,采用气相色谱法测定。该方法的添加回收率为90.71%～99.06%,变异系数为0.89%～3.34%,最低检出浓度为0.05 mg/kg,最低检出量为1.89×10-10g。消解动态试验结果表明,仲丁灵按推荐使用剂量(1 800 g/hm2)和2倍推荐使用剂量(3 600 g/hm2)施药,它在土壤中的半衰期分别为9.04 d和11.17 d。A method for the determination of butralin residue in soil using gas chromatography（GC） was developed and degradation dynamics of butralin was estimated.Samples of soil were extracted with acetone.The extracts were cleaned-up with a Florisil column.The residue of butralin was determined by GC method.The average recoveries ranged from 90.71% to 99.06% with relative standard deviation 0.89%-3.34%.The lowest detectable concentration of butralin in soil was 0.05 mg/kg,and the detection limit was 1.89×10-10 g.The results showed that the half-lives of butralin in soil were 9.04 d and 11.17 d at single recommended dosage（1800 g/hm2） and double recommended dosage（3600 g/hm2）,respectively.

关 键 词：仲丁灵 土壤 残留分析 消解动态 安全性 

分 类 号：TQ450.2[化学工程—农药化工]