Differential capacitance of liquid/liquid interfaces: effect of electrolytes present in each phase

Abstract

The effect of electrolyte type and concentration on the differential capacitance of the 1,2-dichloroethane/water interface has been measured. The results show that the differential capacitance is controlled by the pair ion (1)–counter-ion (2), where 1 and 2 denote the different phases. At constant organic electrolyte composition the capacity increases in the order, F– MTMA+ > TBA+ > TOA+, TPB– > TCPB–. In very dilute solutions, the effects are not noticeable.