Volume 44, Number 3a (Special
Dedicated to Professor Adam Hulanicki on the occasion of 70th birthaday
Key words: voltammetry, migration, stedy-state current, supporting electrolyte
Equations for the dependence of the limiting steady-state current on
concentration of supporting electrolyte for arbitrarily charged species
were developed based on the general theory of steady-state voltammetry
by Myland and Oldham. The only limitations of the proposed model are that
the electrode reaction must result in the neutral product and that diffusion
coefficients of all species do not differ significantly. Theoretical predictions
presented as a ratio of the limiting current, Il, to diffusional
current, Id, are compared with experimental data for reduction
of Tl+ and Cd+2 at mercury film microelectrodes in
solutions of various concentrations and types of supporting electrolyte.
Experimental results agree well with theoretical predictions.