ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 28, Number 3
JKCSEZ 28(3)
June 20, 1984 

The transport rates of K+ion through CHCl3 liquid membrane containing dibenzo-18-crown-6(DBC) as a carrier molecule have been determined at 25℃. The transport rates depend highly on the ion concentration and on the nature of anion. It is concluded that K+ions are transported in the form of ion-pair. In the case of potassium picrate, however, it is found that the transport proceeds with the formation of the incomplete ion-pair in the concentration less than 1.0 × 10-3M of picrate, while with the complete formation of ion-pair in the concentration more than 1.0 × 10-3M of picrate. Seven steps of the transport process are suggested and they can be illustrated in terms of energy barrier model as a function of the position of ionic species in the membrane.