Solid-phase extraction of trace Au(Ⅲ) with SDG and determination by the catalytic spectrophotometric method

作     者：LI Huizhi ZHAI Yubo 

作者机构：School of Chemistry and Chemical Engineering Jinan University Jinan 250022 China School of Life Science Nanjing University Nanjing 210093 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2008年第27卷第6期

页      面：560-565页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 0806[工学-冶金工程] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

主　　题：analytical chemistry catalytic kinetic spectrophotometric method solid-phase extraction gold(Ⅲ) 

摘      要：The new catalytic kinetic spectrophotometric method for Au（III） determination was developed and validated. It was based on the catalytic effect of gold on the oxidation of sudan red III by ammonium peroxodisulfate （（NH4）2S2O8） with nitrilo triacetic acid as an activator in microemulsion and H2SO4 medium. Under optimum conditions, there was the linearity of the calibration curve in the concentration range from 0 to 20 μg/L Au（Ⅲ） at 520 nm. The relative standard deviation was 3.0% with a correlation coefficient of 0.9986. The detection limit achieved was 9.75 × 10^-5 μg/mL. A new method using a column packed with sulfhydryl dextrose gel （SDG） as a solid-phase extractant has been developed for the preconcentration and separation of Au（Ⅲ） ions. The method has been applied to the determination of trace gold with satisfactory results.