Parameters affecting the determination of mercury by anodic stripping voltammetry using a gold electrode

TALANTA

卷:75

Article

Giacomino, Agnese¹  Abollino, Omella¹  Malandrino, Mery¹  Mentasti, Edoardo¹ 

[1] Univ Turin, Dept Analyt Chem, I-10125 Turin, Italy

关键词: mercury;    anodic stripping voltammetry;    gold electrode;    supporting electrolyte;    wave form;   

DOI  :  10.1016/j.talanta.2007.11.015

来源: Elsevier

【 摘 要 】

The electrochemical determination of aqueous Hg(II) by anodic stripping voltammetry (ASV) at a solid gold electrode is described. The aim of this work is to optimise all factors that can influence this determination. Potential wave forms (linear sweep, differential pulse, square wave), potential scan parameters. deposition time, deposition potential and surface cleaning procedures were examined for their effect on the mercury peak shape and intensity. Five supporting electrolytes were tested. The best responses were obtained with square wave potential wave form and diluted HCl as supporting electrolyte. Electrochemical and mechanical surface cleaning, aimed at removing the amount of mercury deposited onto the gold surface, were necessary for obtaining a good performance of the electrode. Response linearity, repeatability, accuracy and detection limit were also evaluated. (C) 2007 Elsevier B.V. All rights reserved.

【 授权许可】

Free