Adsorptive cathodic stripping voltammetric determination of gold(III) in the presence of yeast mannan

被引：20

作者：

Lack, B

Duncan, J

Nyokong, T

机构：

[1] Rhodes Univ, Dept Chem, ZA-6140 Grahamstown, South Africa

[2] Rhodes Univ, Dept Biochem & Microbiol, ZA-6140 Grahamstown, South Africa

来源：

ANALYTICA CHIMICA ACTA | 1999年 / 385卷 / 1-3期

关键词：

gold; stripping voltammetry; mannan; copper; yeast;

D O I：

10.1016/S0003-2670(98)00736-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Adsorptive cathodic stripping voltammetric (AdCSV) studies of gold(III) on a glassy carbon electrode and in the presence of yeast mannan are reported. These studies give evidence of the formation of a complex between gold(III) and mannan in acid media as judged by the enhancement in the AdCSV currents and shift in the reduction peak of gold(III) in the presence of mannan. The AdCSV currents were linearly dependent on gold(III) concentrations ranging from 7.0 x 10(-7) to 3.0 x 10(-4) mol dm(-3). A detection limit of 6.0 x 10(-8) mol dm(-3) was obtained, interferences of copper(II) were observed in the presence of mannan, but there was no significant interference of silver(I). (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：393 / 399

页数：7

共 19 条

[1] Comparison of the gold reduction and stripping processes at platinum, rhodium, iridium, gold and glassy carbon micro- and macrodisk electrodes [J].