期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 169, 期 1-3, 页码 742-745出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2009.04.003
关键词
Glyphosate; Dithiocarbamic acid; Copper dithiocarbamate complex; Spectrophotometric
A simple selective spectrophotometric method has been developed for the determination of glyphosate herbicide in environmental and biological samples. Glyphosate was reacted with carbon disulphide to form dithiocarbamic acid which was further followed for complex formation with copper in the presence of ammonia. The absorbance of the resulting yellow coloured copper dithiocarbamate complex was measured at 435 nm with molar absorptivity of 1.864 x 10(3) Lmol(-1) cm(-1).The analytical parameters were optimized and Beer's law was obeyed in the range of 1.0-70 mu g mL(-1). The composition ratio of the complex was glyphosate: copper (2: 1) as established by Job's method with a formation constant of 1.06 x 10(5). Glyphosate was satisfactorily determined with limit of detection and quantification of 1.1 and 3.7 mu g mL(-1), respectively. The investigated method was applied successfully to the environmental samples. Recovery values in soil, wheat grains and water samples were found to be 80.0 +/- 0.46 to 87.0 +/- 0.28%, 95.0 +/- 0.88 to 102.0 +/- 0.98% and 85.0 +/- 0.68 to 92.0 +/- 0.37%, respectively. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据