The transfer of H+, Li+, Na+, Zn2+, Mg2+ and Cu2+ facilitated by ionophore ETH 129 (N,N,N',N-tetracyclohexyl-3-oxapentanediamide) across water/nitrobenzene interface has been studied by the cyclic voltammetry. The mechanism of the transfer process has been discussed. The diffusion coefficients and the stability constants for the complexes formed in the nitrobenzene phase have been determine

Key words: SODIUM ION, WATER, CARRIERS, STABILITY CONSTANT, COPPER ION, MAGNESIUM ION, HYDROGEN ION, NITROBENZENE, INTERFACES, DIFFUSION COEFFICIENTS