Preconcentration and electroanalysis of silver species at polypyrrole film modified glassy carbon electrodes

F. Y. Song, Kwok Keung SHIU*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)

Abstract

Silver species can be entrapped in electropolymerized polypyrrole films without deliberate incorporation of chemically active counterions. The effects of polypyrrole coverage and preparation condition, oxidation states, solution composition, pH and the presence of other metal ions on the preconcentration have been investigated. Experimental results showed that the peak current and the integrated charge for incorporated silver species showed good linear concentration dependence in the range of 2-150 μM. The detection limit was estimated to be about 2 μM (about 0.2 ppm Ag). Most of the metal ions studied, including cobalt, nickel, cadmium, lead, zinc and iron, did not show obvious interference on the determination. Copper and mercury species were also extracted onto polypyrrole film electrodes and caused significant interference in the determination of silver species. The mechanism involved in the preconcentration of silver species at polypyrrole electrodes was explored.

Original languageEnglish
Pages (from-to)161-170
Number of pages10
JournalJournal of Electroanalytical Chemistry
Volume498
Issue number1-2
DOIs
Publication statusPublished - 16 Feb 2001

Scopus Subject Areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

User-Defined Keywords

  • Electroanalysis
  • Polypyrrole
  • Silver determination

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