On Electromigration in Ion-Exchange Paper

Abstract

The electromigration of ions in the ion-exchange filter paper impregnated with pulverized ionexchange resin is considered to be contributed by the ionexchange adsorption and the electromigration behavior of ions.
In this study, an apparatus to be used for ordinary paper electrophoresis was used for determining the mobility of alkaline earth metal ions under constant voltage.
The ion-exchange papers used for the experiment were the Amberlite SA-2 and WA-2 which had been conditioned with acid, alkali and methanol.
The ionic electromigration in the ion-exchange papers showed lower velocity and less tailing than in the ordinary paper. The ionic mobility on the filter paper decreased in the order of Ba²⁺>Sr²⁺, Ca²⁺>Mg²⁺ which was the same mobility in free solution. The mobility on the sulfonic Amberlite SA-2 paper was in the order of Sr²⁺, Ca²⁺>Mg²⁺>>Ba²⁺.
This study revealed that the ion-exchange adsorption had a remarkable effect on the electromigration behavior of ions and that this method was applicable to the separation of ions and the clarification of ionic transport behavior across the ion-exchange membrane.