Electrochemical determination of chromium(VI) using metallic nanoparticle-modified carbon screen-printed electrodes

被引：108
|
作者：
Dominguez-Renedo, Olga [1 ]
Ruiz-Espelt, Laura [1 ]
Garcia-Astorgano, Natalia [1 ]
Julia Arcos-Martinez, M. [1 ]
机构：
[1] Univ Burgos, Dept Quim, Area Quim Analit, Fac Ciencias, E-09001 Burgos, Spain
来源：
TALANTA | 2008年 / 76卷 / 04期
关键词：
silver nanoparticles; gold nanoparticles; screen-printed electrodes; chromium; voltammetry;
D O I：
10.1016/j.talanta.2008.04.036
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Carbon screen-printed electrodes (CSPEs) modified with metal nanoparticles present an interesting alternative in the determination of chromium(VI) by differential pulse voltammetry (DPV). Metallic silver and gold nanoparticle deposits have been obtained by electrochemical deposition. Scanning electron microscopy measurements show that the electrochemically synthesized silver and gold nanoparticles are deposited in aggregated form. The detection limit for the analytical procedures developed in this work were 8.5 x 10(-7) and 4.0 x 10(-1) M for silver and gold nanoparticle-modifed CSPE, respectively. In terms of reproducibility, the precision of the above-mentioned method was calculated at 6.7% in %R.S.D. values for silver and 3.21% for gold nanoparticle CSPE. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：854 / 858
页数：5
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