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Science 13 February 1970:
Vol. 167. no. 3920, pp. 987 - 988
DOI: 10.1126/science.167.3920.987
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Articles

Potassium Ion Specific Electrode with High Selectivity for Potassium over Sodium

M. S. Frant 1 and J. W. Ross Jr. 1

1 Orion Research Incorporated, Cambridge, Massachusetts 02139

A new potassium electrode, made from valinomycin, which uses commercially available electrode configurations, responds to potassium ion concentrations from 1 mole per liter to below 10-6 mole per liter. It is highly selective for potassium ion over sodium ion and divalent ions and can be used for the direct determination of potassium ion in human serumn. No significant complexing of potassiium appears to occur in normal seruin.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Potassium-Adenosine Triphosphate Complex: Formation Constant Measured with Ion-Selective Electrodes.
G. A. Rechnitz and M. S. Mohan (1970)
Science 168, 1460
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Science. ISSN 0036-8075 (print), 1095-9203 (online)