The Donnan law and its application to ion exchanger polymers

Autor:	R. E. Watts, Eugen Glueckauf
Rok vydání:	1962
Předmět:	Partition coefficient chemistry.chemical_classification Range (particle radiation) General Energy Ion exchange Chemistry Phase (matter) Diffusion Analytical chemistry Thermodynamics Electrolyte Polymer Volume concentration
Zdroj:	Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 268:339-349
ISSN:	2053-9169 0080-4630
DOI:	10.1098/rspa.1962.0145
Popis:	A new technique of measuring the electrolyte up take from dilute solutions by ion exchanger polymers has been developed, which perm its measurements at solution concentrations as low as 10 -4 m. The results show that the Donnan equilibrium relation, which at low concentrations predicts a co-ion distribution coefficient proportional to the solution concentration, is not obeyed. In stead it is shown that the distribution coefficient is proportional over a very wide range to a low power of the external counter-ion concentration. Measurements of the diffusion coefficients in the exchanger phase show an abnormally high dependence on concentration. The conclusion is drawn that these phenomena are due to the fact that even the ‘homogeneous’ exchanger polymers are not uniform and thus cannot be treated as a single phase.
Databáze:	OpenAIRE
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