Home List of Titles Catalytic oxidation of ascorbic acid at a polyhistidine modified electrode and its application to the voltammetric resolution of ascorbic acid and dopamine
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/150083
- Catalytic oxidation of ascorbic acid at a polyhistidine modified electrode and its application to the voltammetric resolution of ascorbic acid and dopamine
- Yu, Ai-Min; Sun, Deng-Ming; Gu, Hai-Ying; Chen, Hong-Yuan
- A new polymer (polyhistidine) modified electrode has been fabricated and was applied to the catalytic oxidation of ascorbic acid (AA), reducing the overpotential by 400 mV. The catalytic rate constant of the modified electrode for the oxidation of AA was determined using a rotating electrode. The catalytic current was linearly dependent on the ascorbic acid concentration between 5 x 10^-5 and 2 x 10^-3 M. The catalytic effect on the AA resulted in the separation of the overlapping voltammograms of AA and dopamine (DA) in a mixture. This allowed the determination of AA in the presence of DA. The electrode was rather stable even after several months; a reproducible response of AA was obtained.
- Publication type
- Journal article
- Analytical Letters, Vol. 29, no. 15 (Dec 1996), pp. 2633-2643
- Publication year
- FOR Code(s)
- 0301 Analytical Chemistry
- Ascorbic acid; Dopamine; Polyhistidine modified electrode; Voltammetric resolution
- Marcel Dekker (now an imprint of Taylor & Francis)
- Publisher URL
- Copyright © 1996 by Marcel Dekker, Inc. The copyright policy of the publisher allows the accepted manuscript of the paper to be reproduced here after a publisher-imposed embargo period.
- Peer reviewed