期刊
ANALYTICA CHIMICA ACTA
卷 604, 期 2, 页码 114-118出版社
ELSEVIER
DOI: 10.1016/j.aca.2007.10.008
关键词
immobilized nanometer titanium dioxide; preconcentration; gold; flame atomic absorption spectrometry
A new method has been developed for the determination of gold based on separation and preconcentration with a microcolumn packed with nanometer TiO2 immobilized on silica gel (immobilized nanometer TiO2) prior to its determination by flame atomic absorption spectrometry. The optimum experimental parameters for preconcentration of gold, such as pH of the sample, sample flow rate and volume, eluent and interfering ions, have been investigated. Gold could be quantitatively retained by immobilized nanometer TiO2 in the pH range of 8-10, then eluted completely with 0.1 mol L-1 HNO3. The detection limit of this method for Au was 0.21 ngmL(-1) with an enrichment factor of 50, and the relative standard deviation (R.S.D.) was 1.8% at the 100ngmL(-1) Au. level. The method has been applied for the determination of trace amounts of Au in geological and water samples with satisfactory results. (c) 2007 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