Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10560195 | Talanta | 2005 | 7 Pages |
Abstract
The electrochemical detection of hexavalent chromium species was investigated. It was found that Cr(VI) can undergo chemically irreversible reduction in acidic solutions at gold, glassy carbon and boron-doped diamond electrodes. The process was found to be diffusionally controlled at all three electrodes studied. The response obtained at a gold electrode towards the reduction of chromium(VI) produced an electrochemically reversible wave in contrast to those recorded at glassy carbon and boron-doped diamond electrodes. The analytical response of the hexavalent species was studied at gold electrodes in the presence of common environmental interferences: Ni2+, Cu2+, Fe3+, Cr3+ and Triton X-100 (surfactant), with an LoD of 4.3 μM obtained in the presence of 5 mM Cr(III).
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Christine M. Welch, Olga Nekrassova, Richard G. Compton,