Simultaneous detection of dopamine and ascorbic acid using silver/silver sulfide modified carbon nanotube electrodes

Yi Kai Chih, Ming Chang Yang

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

In this study, silver/silver sulfide (Ag/Ag2S) was applied on an electrochemical system for the simultaneous determination of dopamine (DA) and ascorbic acid (AA) in phosphate buffer solution (pH 7.0). The Ag/Ag2S nanoparticles were dispersed with carbon nanotube (CNT) in Nafion to be an Ag/Ag2S-immobilized CNT electrode. The electrochemical behaviors of DA and AA were examined using the differential pulse voltammetry (DPV) technique. The characteristic peaks of DA and AA in the differential pulse votammogram were well separated. Without Ag/Ag2S, CNT electrode cannot detect AA. When Ag/Ag2S nanoparticles were immobilized on the CNT electrode, the sensitivity to DA increased from 0.637 to 1.000μAμM-1cm-2, and the sensitivity to AA became 0.020μAμM-1cm-2 in the linear concentration range of 250-2000μM.

Original languageEnglish
Pages (from-to)833-839
Number of pages7
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume45
Issue number3
DOIs
Publication statusPublished - 2014 May

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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