茚三酮柱后衍生化氨基酸分析仪测定桑叶中痕量草甘膦  

Determination of Trace Glyphosate in Mulberry Leaf Samples by Amino Acid Analyzer with Ninhydrin Post-column Derivatization

作　　者：吴华[1] 林琼芳[1] 黄鸿[1] 欧剑峰[1] 刘桂清[1] 郑基焕[1] 

机构地区：[1]广东省昆虫研究所广东省野生动物保护和利用公共实验室,广州510260

出　　处：《农药》2009年第8期593-594,共2页Agrochemicals

摘　　要：利用衍生化试剂茚三酮,对桑叶样品中的痕量草甘膦进行柱后衍生化,经氨基酸分析仪进行定量分析,建立了桑叶中痕量草甘膦的分析方法。结果表明:草甘膦在0.1～16.4mg/L间呈良好的线性关系,线性相关系数为0.9986,加样回收率为77.4%～91.3%,相对标准偏差为4.4%～5.0%,以信噪比为3计,草甘膦的最低检出限为0.01mg/kg。An approach has been developed to determinating the trace glyphosate of mulberry leaf by amino acid analyzer with ninhydrin post-column derivatization method. The linear range for glyphosate was 0.1-16.4 mg/L, correlating coefficient was 0.9986. The recovery rate of glyphosate was 77.4-91.3%, and the RSD was 4.4-5.0%. The detection limit was 0.01 mg/kg （S/N=3）.

关 键 词：茚三酮 柱后衍生 氨基酸分析仪 草甘膦 桑叶 痕量分析 

分 类 号：TQ450.263[化学工程—农药化工]