Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 10, Issue 6, Pages 899-902Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2008.04.013
Keywords
cysteine; poly(3,4-ethylenedioxythiophene); screen-printed electrode; cyclic voltammetry; flow-injection amperometry
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The electrocatalytic oxidation of cysteine at screen-printed electrode (SPE) modified with electrogenerated poly(3,4-ethylenedioxythiophene) film (PEDOT) was investigated. Cyclic voltammetric studies showed that the SPE/PEDOT electrode lowers the overpotentials and improves electrochemical behavior of cysteine oxidation, as compared to the bare SPE. The catalytic oxidation responses were studied and the reaction mechanisms were discussed. Excellent analytical features, including high sensitivity, low detection limit and satisfactory dynamic range, were achieved by flow-injection amperometry under optimized conditions. (c) 2008 Elsevier B.V. All rights reserved.
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