Some Characteristics of Ion-Selective Electrode Membrane Surfaces

Abstract

Some studies of the features of surfaces of PVC based liquid ion-exchanger and neutral carrier membranes, and of solid-state membranes of ion-selective electrodes are reviewed with respect to the application of X-ray fluorescence (XRF), Auger spectroscopy and scanning electron microscopy (SEM), Among the membranes discussed are those responding to (i) calcium for organophosphate type membranes, (ii) barium and polyalkoxylate non-ionic surfactants for PVC membranes based on complexes of barium with polyalkoxylate s, (iii) copper(II) for solid-state membranes of mixed copper(II) sulphide and silver sulphide, and (iv) sulphide and thiols for membranes of silver sulphide.

Key Words:

• Ion-selective electrodes
• surface analysis
• X-ray fluorescence
• scanning electron microscopy
• Auger spectroscopy
• surface character of ISE membranes