期刊
SPECTROSCOPY LETTERS
卷 42, 期 1, 页码 42-48出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/00387010802428427
关键词
catalytic kinetic; fluorescent quenching method; gold(III); 3-(3'-methylphenyl)-5-(2'-arsenoxylphenylazo) rhodanine; solid-phase extraction
类别
资金
- Science Research Foundation of Shandong Province, China [Y2007B07]
- Key Subject (Laboratory) Research Foundation of Shandong Province, China [XTD0705]
- National Eleventh Five-Year Plan, China [2006BAJ03A09]
A new catalytic kinetic fluorescent quenching method for the determination of trace gold(III) was investigated. The method was based on the catalytic effect of gold on oxidation of 3-(3'-methylphenyl)-5- (2'-arsenoxylphenylazo) rhodanine by hydrogen peroxide in potassium hydrogen phthalate-hydrochloric acid (pH=3.4). Under the optimum conditions, the great decrease of fluorescence intensity has a linear relationship against the concentration of gold in the range of 0 to 12.0gL-1 with a detection limit of 6.010-10gL-1. The coexistent metal ions can be separated, and gold can be enriched by TBP resin of solid-phase extraction, which greatly improves the selectivity and sensitivity of the system. The method can be used to determine trace amounts of gold in ore samples successfully with satisfactory results.
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