期刊
JOURNAL OF AOAC INTERNATIONAL
卷 97, 期 1, 页码 238-244出版社
AOAC INT
DOI: 10.5740/jaoacint.12-315
关键词
-
资金
- Cumhuriyet University Scientific Research Projects Commission
A new micelle-mediated extraction method was developed for preconcentration of ultratrace Hg(II) ions prior to spectrophotometric determination. 2-(2'-Thiazolylazo)-p-cresol (TAC) and Ponpe 7.5 were used as the chelating agent and nonionic surfactant, respectively. Hg(II) ions form a hydrophobic complex with TAC in a micelle medium. The main factors affecting cloud point extraction efficiency, such as pH of the medium, concentrations of TAC and Ponpe 7.5, and equilibration temperature and time, were investigated in detail. An overall preconcentration factor of 33.3 was obtained upon preconcentration of a 50 mL sample. The LOD obtained under the optimal conditions was 0.86 mu g/L, and the RSD for five replicate measurements of 100 mu g/L Hg(II) was 3.12%. The method was successfully applied to the determination of Hg in environmental water samples.
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