Layer-by-layer thin film-coated electrodes for electrocatalytic determination of ascorbic acid

Baozhen Wang, Takio Noguchi, Jun ichi Anzai

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Multilayer thin films composed of poly(allylamine hydrochloride) (PAH) and carboxymethyl cellulose (CMC) have been prepared on the surface of a gold (Au) disk electrode by a layer-by-layer deposition of PAH and CMC and ferricyanide ions ([Fe(CN)6]3-) were confined in the film. [Fe(CN)6]3- ions can be successfully confined in the films from weakly acidic or neutral [Fe(CN)6]3- solutions, while, in basic solution, [Fe(CN)6]3- ion was not confined. The [Fe(CN)6]3- ion-confined Au electrode showed clear redox peaks in the cyclic voltammogram around 0.35 V versus Ag/AgCl. The amounts of [Fe(CN)6]3- ions confined in the films depended on the thickness of the films or the number of layers in the LbL films. The [Fe(CN)6]3- ion-confined Au electrode was used for electrocatalytic determination of ascorbic acid in the concentration range of 1-50 mM.

Original languageEnglish
Pages (from-to)415-418
Number of pages4
JournalTalanta
Volume72
Issue number2
DOIs
Publication statusPublished - 2007 Apr 30

Keywords

  • Ascorbic acid
  • Electrocatalysis
  • Ferricyanide ion
  • LbL film

ASJC Scopus subject areas

  • Analytical Chemistry

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