Determination of gold using clay modified carbon paste electrode

被引：0
|
作者：
Z. Navrátilová
Petr Kula
机构：
[1] Institute of Geonics,
[2] Academy of Sciences of Czech Republic,undefined
[3] Studentská 1768,undefined
[4] 70800 Ostrava-Poruba,undefined
[5] Czech Republic e-mail: navr@ugn.cas.cz,undefined
来源：
Fresenius' Journal of Analytical Chemistry | 2000年 / 367卷
关键词：
Gold; Chloride; Clay; Ionic Strength; Montmorillonite;
D O I：
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中图分类号：
学科分类号：
摘要：
Sorption of gold(III) chlorocomplexes was studied by means of a carbon paste electrode modified with montmorillonite. Anionic exchange behavior was found in chloride media with low ionic strength. Anionic sorption of [AuCl4]– can be used as a preconcentration step to the determination of Au(III). Linear calibration dependences were found in the concentration range 4.06 × 10–6– 1.22 × 10–5 mol/L Au(III) after 5 min of sorption and in the range 8.12 × 10–7– 6.1 × 10–6 mol/L after 10 min of sorption. Interferences of several anions and cations were studied. Model samples of table water were analyzed.
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页码：369 / 372
页数：3
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