| Abstract. A chloroform membrane system containing dibenzodiaza-15-crown-4 was found to be a highly efficient and selective transport of Ag+ ions through a chloroform liquid membrane. In the presence of thiosulfate ion as a suitable ion stripping agent in the receiving phase, the amount of silver transported across the liquid membrane after 105 min is 95 ± 1.3%. The selectivity of Ag+ transport from aqueous solutions containing Tl+, Pb2+, Cd2+, Ni2+, Co2+, K+, Ca2+, Sr2+, Hg2+, Zn2+, Cu2+ was investigated. The interfering effect of Cu2+ ions was drastically diminished in the presence of EDTA as a proper masking agent in the source phase. |
