Responses of Site-Controlled, Plasticized Membrane Electrodes

Authors

Erno Lindner, Budapest University of Technology and EconomicsFollow
Etelka Gráf, Budapest University of Technology and Economics
Zsuzsa Niegreisz, Budapest University of Technology and Economics
Klára Toth, Budapest University of Technology and Economics
Ernö Pungor, Budapest University of Technology and Economics
Richard P. Buck, The University of North Carolina at Chapel HillFollow

Abstract

Ion exchange with atomic absorption methods has been used to determine the anionic site concentrations of membranes and membrane-support materials: poly(vinyl chloride) (PVC) and carboxylated PVC. Total site concentrations can be determined. Impedance measurements of site-controlled membranes prove that not all sites are available to K+in PVC-C-OOH based neutral carrier membranes. The theory of selectivity, based on the assumption that the carrier/available site concentration ratio is the most important factor, is thoroughly tested. New results on site concentration control by tetraphenyiborate. (TPB~) and tetrakls(p-chlorophenyl)borate emphasize the systematic variation of selectivity with carrl-er/stte ratio. At low carrier levels, TPB” can be spontaneously lost from membranes until the unity carrler/slte ratio is achieved. © 1988, American Chemical Society. All rights reserved.

Publication Title

Analytical Chemistry

Recommended Citation

Lindner, E., Gráf, E., Niegreisz, Z., Toth, K., Pungor, E., & Buck, R. (1988). Responses of Site-Controlled, Plasticized Membrane Electrodes. Analytical Chemistry, 60 (4), 295-301. https://doi.org/10.1021/ac00155a004