A Calcium Ion-Selective Electrode Based on a Neutral Carrier
作者:
D. Ammann,
E. Pretsch,
W. Simon,
期刊:
Analytical Letters
(Taylor Available online 1972)
卷期:
Volume 5,
issue 11
页码: 843-850
ISSN:0003-2719
年代: 1972
DOI:10.1080/00032717208069566
出版商: Taylor & Francis Group
关键词: Calcium ion;selective electrode;neutral carrier;liquid membrane;pH-dependence;selectivity constant;dielectric constant
数据来源: Taylor
摘要:
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 10−1M to 10−5M 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.
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