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Preparation of cupric palmitate membrane, its characterization and evaluation of thermodynamically effective fixed charge density
Author(s) -
Nasim Beg M.,
Siddiqi Fasih A.,
Husain Akmal,
Islam Badrul
Publication year - 1979
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02533455
Subject(s) - membrane , chemistry , electrolyte , fixed charge , charge density , ion , non equilibrium thermodynamics , thermodynamics , chemical physics , analytical chemistry (journal) , chromatography , electrode , physics , organic chemistry , biochemistry , quantum mechanics
Membrane potentials have been measured across, parchment‐supported cupric palmitate membrane separating various 1∶1 electrolytes at concentrations C 1 and C 2 such that C 2 =10 C 1 . Membrane potential data have been used to calculate transference number of ions, permselectivity and also to derive the thermodynamically effective fixed charge density which is an important characteristic governing the membrane phenomena, by utilizing the generally accepted and most widely used theory of Teorell‐Meyer and Sievers as well as the recent theories for membrane potential of Kobatake et al. and Nagasawa et al. based on the principles of nonequilibrium thermodynamics. The values of charge densities derived from different theories were almost the same, confirming thereby the validity of the recently developed theories of membrane potential.