A Calcium Ion-Selective Electrode Based on a Neutral Carrier
- 1 January 1972
- journal article
- research article
- Published by Informa UK Limited in Analytical Letters
- Vol. 5 (11), 843-850
- https://doi.org/10.1080/00032717208069566
Abstract
The performance of a liquid-membrane electrode using a synthesized ligand in p-nitroethylbenzene as membrane component is described. Selectivities, working range, lifetime, pH-dependence, and dependence on the dielectric constant of the membrane solvent are discussed. The electrode makes possible the measurement of calcium ion activities in the range of 10−1 M to 10−5 M In unbuffered systems with a selectivity of calcium over sodium and magnesium of 175 and 33,000 respectively. The selectivity constants of the cell discussed are heavily influenced by the dielectric constant of the membrane solvent.Keywords
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