Dr Kevin Honeychurch Kevin.Honeychurch@uwe.ac.uk
Senior Lecturer in Forensic Science
Dr Kevin Honeychurch Kevin.Honeychurch@uwe.ac.uk
Senior Lecturer in Forensic Science
Daniel M. Hawkins
John Hart John.Hart@uwe.ac.uk
Professor
David C. Cowell
Screen-printed carbon electrodes (SPCEs), without chemical modification, have been investigated as disposable sensors for the measurement of trace levels of Cu2+. Cyclic voltammetry was employed to elucidate the electrochemical behaviour of Cu2+ at these electrodes in a variety of 2 supporting electrolytes. For all of the electrolytes studied the anodic peaks, obtained on the reverse scans, showed that the Cu2+ had been deposited as a thin layer on the surface of the SPCE. The anodic peak of greatest magnitude was obtained in 0.1 M malonic acid. The possibility of determining Cu2+ at trace levels using this medium was examined by differential pulse anodic stripping voltammetry (DPASV). The effect of Bi3+, Cd2+, Fe3+, Hg22+, Pb2+, Sb3+ and Zn2+ on the Cu stripping peak was examined and under the conditions employed, only Hg22+ was found to significantly effect the response gained. The sensors were evaluated by carrying out Cu2+ determinations on spiked and unspiked serum and water samples. The mean recovery was found in all cases to be > 90% and the performance characteristics indicated the method holds promise for trace Cu2+ levels by employment of Hg-free SPCEs using DPASV. © 2002 Elsevier Science B.V. All rights reserved.
Journal Article Type | Article |
---|---|
Publication Date | May 24, 2002 |
Deposit Date | Aug 6, 2010 |
Journal | Talanta |
Print ISSN | 0039-9140 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 57 |
Issue | 3 |
Pages | 565-574 |
DOI | https://doi.org/10.1016/S0039-9140%2802%2900060-7 |
Keywords | screen-printed carbon electrodes, copper, differential pulse stripping voltammetry, mercury-free |
Public URL | https://uwe-repository.worktribe.com/output/1077952 |
Publisher URL | http://dx.doi.org/10.1016/S0039-9140(02)00060-7 |
Contract Date | Nov 15, 2016 |
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