Determination of catechol derivatives on pretreatment and copolymer coated glassy carbon electrode.


Journal Article

A glassy carbon electrode was pretreated electrochemically and was coated with a copolymer of maleic acid anhydride attached with Eastman-AQ55D (MA/AQ). The voltammetric behavior of a series of biologically important compounds, such as dopamine, L-DOPA, DOPAC, ascorbic acid and uric acid were examined at both pretreated and coated electrodes. Electrochemical pretreatment increased peak current of dopamine and L-DOPA while decreased that of ascorbic acid, uric acid and DOPAC. The copolymer coating caused a decrease of peak currents, but effectively hindered the anionic species (ascorbic acid, uric acid and DOPAC) access to the electrode surface. In flow injection and liquid chromatographic analysis. The dopamine and L-DOPA yielded the better selectivity response at MA/AQ electrode than at bare and AQ electrodes.

Full Text

Duke Authors

Cited Authors

  • Liu, A; Wang, E

Published Date

  • January 1, 1994

Published In

Volume / Issue

  • 41 / 1

Start / End Page

  • 147 - 154

PubMed ID

  • 18965900

Pubmed Central ID

  • 18965900

International Standard Serial Number (ISSN)

  • 0039-9140

Digital Object Identifier (DOI)

  • 10.1016/0039-9140(94)80181-9


  • eng

Conference Location

  • Netherlands