Responses of H⁺ selective solvent polymeric membrane electrodes fabricated from modified PVC membranes

Authors

Ernö Lindner, The University of North Carolina at Chapel Hill
Vasile V. Cosofret, The University of North Carolina at Chapel Hill
Robert P. Kusy, The University of North Carolina at Chapel HillFollow
Richard P. Buck, The University of North Carolina at Chapel HillFollow
Thomas Rosatzin, ETH Zürich
Ulrich Schaller, ETH Zürich
Wilhelm Simon, ETH Zürich
Judit Jeney, Budapest University of Technology and Economics

Abstract

Potentiometric responses of a novel class of pH sensitive ionophores, namely several phenoxazine derivatives, were tested in different modified PVC matrices. The ionophores were compounded into liquid membranes as usual or were covalently coupled to the polymeric matrix. The general analytical performance of the membranes and other membrane characteristics (i.e., resistance and response time, as measures of membrane decomposition or structural changes) were followed in time. The transient responses of membranes with mobile ionophores in high molecular weight (HMW) and carboxylated PVC (PVC-COOH) were compared to those with immobilized ionophores. The response time of membranes with immobilized ionophores was found to be between those with mobile ionophores in HMW (fast response) and PVC-COOH (sluggish response). Accordingly, the rate of response was correlated primarily to the -COOH content of the membranes. © 1993.

Publication Title

Talanta

Recommended Citation

Lindner, E., Cosofret, V., Kusy, R., Buck, R., Rosatzin, T., Schaller, U., Simon, W., & Jeney, J. (1993). Responses of H⁺ selective solvent polymeric membrane electrodes fabricated from modified PVC membranes. Talanta, 40 (7), 957-967. https://doi.org/10.1016/0039-9140(93)80151-G