594-597Dibenzyldiaza-18-crown-6 has been used as
a highly efficient and selective carrier for uphill transport of silver ion through
a chloroform bulk liquid membrane, in the presence of picrate ion as a suitable
counter anion. The selectivity and efficienci of Ag+
transport from aqueous solutions containing other cations such as Tl+,
Mg2+, Ca2+, Fe2+, Co2+, Ni2+,
Cu2+, Zn2+, Cd +, Pb2+, Hg2+ and Cr3+
have been investigated. The liquid membrane system is used for the recovery of silver
ion from a developed radiological film and a silver solder sample