氟环唑在稻田环境中的消解动态研究  

Degradation Dynamics of Epoxiconazole in Rice and Paddyfield

作　　者：戴亮[1] 蔡智华 郭正元[1] 

机构地区：[1]湖南农业大学资源环境学院,湖南长沙410128 [2]湖南省益阳市农业局,湖南益阳413000

出　　处：《安徽农业科学》2015年第5期137-139,共3页Journal of Anhui Agricultural Sciences

基　　金：农业部药检所项目

摘　　要：[目的]建立稻田田水、土壤和水稻植株样品中氟环唑的气相色谱分析方法,为正确评价氟环唑在稻田环境中的残留情况提供理论依据。[方法]采用气相色谱分析方法研究了125 g/L氟环唑悬浮剂在水稻及其稻田环境中的消解动态情况。[结果]氟环唑的最小检出量为5.0×10^-11g,最低检测浓度田水为0.005 0 mg/kg、土壤为0.012 5 mg/kg、植株为0.025 0 mg/kg。当添加浓度在0.025 0-1.000 0 mg/kg时,氟环唑在不同样品中的平均回收率为78.5%-101.1%,标准偏差为2.0%-9.0%。氟环唑在田水、稻田土壤和水稻植株中的消解遵循一级化学反应动力学方程,平均消解半衰期分别为3.55、15.00、4.50 d10[结论]氟环唑在稻田田水、土壤、植株中消解均较快,属于易消解农药。[ Objective ] One GC analysis method for determination of Epoxiconazole in rice and paddyfield was established to provide theoretical basis for the evaluation of Epoxiconazole residue in paddyfield. [ Method] The degradation dynamics of 125 g/L Epoxiconazole SE in rice and paddyfield were studied by using GC analysis method. [ Result] The minimum detectable amount of epoxiconazole was g; and the minimum de- tectable concentration of paddy watei＇, soil and rice plant were 0.005 0, 0. 012 5 and O. 025 0 mg/kg, respectively; when adding concentration was 0. 025 0 - 1. 000 0 mg/kg, the average recovery rate of Epoxiconazole in different samples were 78.5% - 101.1%, and the RSD ranged from 2.0% to 9.0% ; the degradation dynamics of Epoxiconazole in paddyfield water, paddyfield soil and plant accorded with the first order chemical reaction kinetic equation, and their average haft-life were 3.55, 15.00 and 4.50 days, respectively. [ Conclusion] Epoxiconazole degraded fast in paddyfield water, paddyfield soil and plant, so it belonged to an easy degraded pesticide.

关 键 词：氟环唑 水稻 消解动态 气相色谱 

分 类 号：S482.2[农业科学—农药学]