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A polarographic and voltammetric study of the copper‐phenazopyridine monohydrochloride system in phosphate buffer medium
Author(s) -
Çakir Osman,
Biçer Ender
Publication year - 1997
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140090120
Subject(s) - polarography , chemistry , copper , inorganic chemistry , phosphate buffered saline , electrochemistry , mercury (programming language) , ion , phosphate , dropping mercury electrode , buffer solution , buffer (optical fiber) , nuclear chemistry , electrode , chromatography , organic chemistry , telecommunications , computer science , programming language
Abstract 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 Cu II 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 Cu I ions. Tests showed that pyridium forms stable complexes with Cu I and Cu II ions. However, it was found that pyridium formed a 1 : 1 complex with Cu II and a 1 : 2 complex with Cu II ions.