Home List of Titles Electrochemical determination of dopamine in the presence of high concentrations of ascorbic acid at a poly(indole-3-acetic acid) coated electrode
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/150052
- Electrochemical determination of dopamine in the presence of high concentrations of ascorbic acid at a poly(indole-3-acetic acid) coated electrode
- Yu, Ai-Min; Sun, Deng-Ming; Chen, Hong-Yuan
- A poly(indole-3-acetic acid) chemically modified electrode offers substantial improvements in voltammetric sensitivity and selectivity towards dopamine (DA). This polymer coating greatly attenuates the voltammetric response of ascorbic acid (AA) while the oxidation peak current of DA is enhanced by over an order of magnitude compared with that at the bare electrode. The high sensitivity and selectivity for DA appears to be mainly due to the charge discrimination and the analyte accumulation. The current response is dependent on both the solution pH and accumulation time. The detection limit is ca. 6.0 x 10^-3 mol/L. In 1.0 x 10^-6 M dopamine solution, AA shows no interference although its concentration is larger by 3 orders. The modified electrode is rather stable; a reproducible response of DA is obtained even after a month.
- Publication type
- Journal article
- Analytical Letters, Vol. 30, no. 9 (Jul 1997), pp. 1643-1652
- Publication year
- FOR Code(s)
- 0301 Analytical Chemistry
- Dopamine; Electrochemical detection; Poly (indole-3-acetic acid) modified electrode
- Marcel Dekker (now an imprint of Taylor & Francis)
- Publisher URL
- Copyright © 1997 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