Selectrode—the universal ion-selective electrode : Part VII. A valinomycin-based potassium electrode with nonporous polymer membrane and solid-state inner reference system |
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Authors: | U. Fiedler J. Růžička |
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Affiliation: | Department of Analytical Chemistry, Chemical Center, University of Lund, S-220 07 Lund 7 Sweden;Chemistry Department A, The Technical University of Denmark, Building 207, 2800 LyngbyDenmark |
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Abstract: | A potassium electrode utilizing a solution of valinomycin in diphenylether and a porous membrane is compared with selectrodes in which the diphenylether has been replaced by a suitable plasticizer and the porous membrane support by a polymer net-work. The development of the polymer membrane allows the use of simplified selectrode construction with a “solid-state” calomel reference system; Rules for a successful choice of a suitable solvent-polymer combination are suggested and used for development of new Polyvinylchloride- and polyurethane-based membranes. |
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