Electroanalysis of copper species at polypyrrole-modified electrodes bearing alizarin red S ligands

Kwok Keung SHIU*, Oi Yin Chan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

Conducting polymer modified electrodes based on the incorporation of the anionic complexing ligand alizarin red S into polypyrrole (Ppy) film during electropolymerization were applied to the electroanalysis of metal species including Cu+ and Cu2+. The copper species were readily extracted into the Ppy film electrode containing the complexing ligands and were determined electrochemically. The sensitivity for determination of Cu2+ species was significantly better than that for Cu+ species at much lower concentrations despite a smaller complex stability, but suffered from a very limited linear region. The results also showed that the ligand-to-metal ratios for complex formation at the Ppy film were concentration dependent.

Original languageEnglish
Pages (from-to)45-51
Number of pages7
JournalJournal of Electroanalytical Chemistry
Volume388
Issue number1-2
DOIs
Publication statusPublished - 16 May 1995

Scopus Subject Areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

User-Defined Keywords

  • Complexing ligands
  • Conducting polymers
  • Modified electrodes
  • Polypyrrole film

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