Voltammetric determination of cysteine at a graphite electrode modified with gold nanoparticles

D. O. Perevezentseva, E. V. Gorchakov

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The electrochemical behaviour of cysteine (Cys) at a graphite electrode modified with gold nanoparticles (GAu nano electrode) was studied by cyclic voltammetry. It was found that the graphite electrode-Au nanoparticles show an electrocatalytic activity towards the oxidation of Cys in 0.1M NaOH. At 0.05 V, there is an "inverse" maximum in the cathodic voltammogram of Cys. Using a G-Au nano electrode, the dependence of the peak current of the "inverse" maximum on Cys concentration was linear in the range from 1 to 14 pM, and the detection limit was 0.6 pM. The proposed analytical method is simple, rapid and sensitive.

Original languageEnglish
Pages (from-to)2405-2410
Number of pages6
JournalJournal of Solid State Electrochemistry
Volume16
Issue number7
DOIs
Publication statusPublished - Jul 2012

Keywords

  • Cyclic voltammetry
  • Cysteine
  • Electrocatalysis
  • Gold nanoparticles

ASJC Scopus subject areas

  • Electrochemistry
  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Materials Science(all)

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