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International Journal of Electrochemistry
Volume 2012 (2012), Article ID 758708, 5 pages
http://dx.doi.org/10.1155/2012/758708
Research Article

Anodic Stripping Voltammetry of Se4+ on Gold-Modified Boron-Doped Diamond Electrodes

1Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
2Advancec R&D Center, HORIBA Ltd., Minami-ku, Kyoto 601-8510, Japan
3JST, CREST, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan

Received 6 April 2011; Accepted 22 May 2011

Academic Editor: Giancarlo R. Salazar-Banda

Copyright © 2012 Stéphane Fierro et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Electrochemical detection of Se4+ has been performed by anodic stripping voltammetry on a boron-doped diamond (BDD) electrode modified with gold nanoparticles deposited through chronocoulometry. This method is based on the affinity between the gold nanoparticles and Se0, while the BDD electrode is presented as an ideal material for metal modification due to its unique properties. The resulting anodic stripping voltammograms exhibited a clear peak at 0.9 V versus AgCl related to Se4+, and highly accurate ( ) calibration curves could be obtained for a selenium concentration range between 10 and 100 μg/L. The influence of Se deposition time and other metals dissolved in solution (Cu, Cd, Pb, Cr, and B) has been investigated as well, and it was found that the Se4+ calibration curves remained unaltered. For all the experiments performed, a detection limit around 10 μg/L was achieved. The high accuracy and reproducibility of the results as well as the excellent stability of the electrode material proves the excellent capabilities of this system for selenium detection.