Heterogeneous precipitate based Cu(II)-ion-selective electrode andits application in the deterination of stability constant of Cu(II) complex with 4-(2-pyridylazo)-resorcinol

摘要

A new Cu(II)-ion selectrode (ISE) based on thiopentone-Cu(II) complex as electroactive material has been described.These lectivity coefficients deterined by mixed solution method,reveal that the electrode is selective in the presence of ions Co(II),Ni(II),Zn(II),Mn(II),Ca(II),Mg(II) and Al(III).The stability constant of Cu(II) complex with 4-(2-pyridylazo)-resorcinol (PAR) has been determined by measuring the free metal ion concentration at different pH using this electrode (log K=13.69).