MECHANISTIC STUDIES OF ION-SELECTIVE GLASS MEMBRANE ELECTRODES

The properties of several ion selective glass membrane electrodes are studied by impedance and galvanostatic measurements. Using methods of electrical network analysis, an equivalent circuit for glass membranes is proposed. It is shown that the electrical double layer at the membrane interface is similar to that of semiconductor electrodes rather than metallic electrodes. The results of galvanostatic measurements are also in agreement with the proposed model. This investigation provides the basic information necessary for an understanding of the electrochemical properties of glass membranes, essential for the measurement of the kinetics of processes at such electrodes. © 1969, American Chemical Society. All rights reserved.