1946
DOI: 10.1021/j150445a008
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Improved Methods of Preparation of “Permselective” Collodion Membranes Combining Extreme Ionic Selectivity with High Permeability.

Abstract: The preparation and properties of "permselective"2 collodion membranes which combine extreme ionic selectivity with high permeability have been described recently (3, 9), and a preliminary account was given of their usefulness in various types of physicochemical studies (6,8,9,10,15).The permselective collodion membranes were prepared (3) as follows: A solution of collodion in ether-alcohol was poured over test tubes which were rotated slowly in a horizontal position. The film thus formed was allowed to dry fo… Show more

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Cited by 77 publications
(42 citation statements)
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“…In this paper we report systematic measurements of the electrical resistances and of the rates of self-exchange of critical ions across membranes of the type which exhibit the divergent behavior, namely collodion matrix membranes activated with poly-2-vinyl-N-methyl pyridinium bromide (PVMP) (13).2 Analogous systematic measurements, made under the same conditions, with several other types of collodion matrix membranes yielded results which were essentially in accord with Equation 2 a. These membranes included anion permeable membranes of another type, prepared with the protein protamine as activating polyelectrolyte (14), and two types of cation permeable membranes, some activated with polystyrene sulfonic acid (PSSA) (15) and some obtained by oxidation of preformed collodion membranes (16).…”
mentioning
confidence: 81%
“…In this paper we report systematic measurements of the electrical resistances and of the rates of self-exchange of critical ions across membranes of the type which exhibit the divergent behavior, namely collodion matrix membranes activated with poly-2-vinyl-N-methyl pyridinium bromide (PVMP) (13).2 Analogous systematic measurements, made under the same conditions, with several other types of collodion matrix membranes yielded results which were essentially in accord with Equation 2 a. These membranes included anion permeable membranes of another type, prepared with the protein protamine as activating polyelectrolyte (14), and two types of cation permeable membranes, some activated with polystyrene sulfonic acid (PSSA) (15) and some obtained by oxidation of preformed collodion membranes (16).…”
mentioning
confidence: 81%
“…Such tests, however, became possible after both highly cation and anion selective membranes, "permselective membranes," had been elaborated [2,5,8,19,30]. In numerous experiments with various suitably constructed macromodels [20,21], the quantities of electrolyte moving into the more dilute solution agreed within _+ 2% with the number of faradays that flowed during the same period; in other words, the conception developed in Figs.…”
Section: Review Of the Literaturementioning
confidence: 86%
“…In the case of negatively charged ion-selective membranes such as the glass electrode, for example, pr the nitrocellulose membranes of Gregor and Sollner [ 9 ] , the selectivity constant is a maximum at low salt concentrations, where the electrical sieve barrier effects are also a maximum.…”
mentioning
confidence: 99%