高效液相色谱检测呋虫胺在稻田水和土壤中的残留及消解动态  

Residue and decline study of dinotefuran in paddy water and soil by high performance liquid chromatographic

作　　者：韦婕[1] 邓婕[1] 黄慧俐[1] 陈兆杰[1] 韦婧[1] 谭辉华[1] 李雪生[1] 

机构地区：[1]广西大学农药与环境毒理研究所,南宁530005

出　　处：《农药学学报》2015年第2期195-200,共6页Chinese Journal of Pesticide Science

基　　金：广西大学科研基金项目(XBZ110383);广西特聘专家工程专项(2013B015)

摘　　要：建立了高效液相色谱检测呋虫胺在稻田水和土壤中残留量的方法，并采用所建方法分析了广西、湖南和安徽3地稻田水和土壤中呋虫胺的消解动态。稻田水样经过滤后直接分析；土壤用乙腈－水提取，提取液经盐析检测，探索在不同色谱条件下呋虫胺的保留行为。结果表明：样品中目标峰的分离效果好，方法的最小检出量（ LOD）为0.08 ng，最低检出浓度（ LOQ）为0.05 mg/kg，平均回收率为74％～83％，相对标准偏差（ RSD ）为1.6％～5.9％；呋虫胺在稻田水中的消解动态符合一级动力学方程，消解较快，半衰期分别为20.5 d（广西）、4.5 d（湖南）和3.3 d（安徽）；其在土壤中的原始沉积量未检出，未进行动力学方程拟合。A method of residue detection of dinotefuran in paddy water and soil by high performance liquid chromatographic （ HPLC） was established and applied in the analysis of samples from Guangxi, Hunan and Anhui. Paddy water was filtrated by double filters and soil samples were extracted with acetonitrile-water, and the retention of dinotefuran in different chromatographic conditions was studied. The results showed that the excellent separation was obtained and the limit of detection （ LOD ） was 0. 08 ng and the limit of quantification （LOQ） was 0. 05 mg/kg. The range of average recovery was 74% to 83% and the relative standard deviations （ RSD ） was 1 . 6% to 5 . 9%. The dissipation dynamics of dinotefuran in paddy water accorded with the first-order kinetics equation, the half-life was 20. 5 d（Guangxi）, 4. 5 d （Hunan） and 3. 3 d （Anhui） . The original deposition was not detected in soil and the kinetic equation was not simulated.

关 键 词：呋虫胺 稻田 高效液相色谱 残留 消解动态 

分 类 号：O657.72[理学—分析化学] S481.8[理学—化学]