A Polarographic and Voltammetric Study of the Copper-Phenazopyridine Monohydrochloride System in Phosphate Buffer Medium

Çakir O., Biçer E.

Electroanalysis, vol.9, no.1, pp.87-90, 1997 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 9 Issue: 1
  • Publication Date: 1997
  • Doi Number: 10.1002/elan.1140090120
  • Journal Name: Electroanalysis
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.87-90
  • Keywords: Copper, Phenazopyridine monohydrochloride, Polarography, Voltammetry
  • Ondokuz Mayıs University Affiliated: Yes


The electrochemical behavior of copper complexed with phenazopyridine monohydrochloride (2,6-diamino 3-phenylazo-pyridine monohydrochloride, pyridium) has been studied in 0.1 M phosphate buffer (pH 6.0). It was observed that CuII ions in the presence of pyridium are reduced at the mercury electrode in two distinct stages; this is a consequence of the interaction of pyridium with CuI ions. Tests showed that pyridium forms stable complexes with CuI and CuII ions. However, it was found that pyridium formed a 1:1 complex with CuI and a 1:2 complex with CuII ions.