Transition metal ion-selective membrane electrodes based on complexing compounds with heteroatoms. Part I. Complexing compounds containing nitrogen atoms

Abstract

Several groups of complexing compounds containing nitrogen atoms have been used as ionophores in copper(II)-selective solvent polymeric membrane electrodes. Some of these electrodes showed an impressive linear response in the copper(II) activity range 10^–5-10^–1 M with a near-Nernstian slope and fairly high selectivity towards other transition metal ions. The internal electrolyte and the conditioning method did not exert a significant influence on the electrode functions.