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The influence of the structure of the double layer on the morphology of the polarographic curves

Research paper by Lucien Gierst

Indexed on: 01 Jan '60Published on: 01 Jan '60Published in: Analytical and Bioanalytical Chemistry



Abstract

It is emphasized that proper account of the ψ effect allows not only a better understanding of the morphological pecularities of the polarographic curves and a more accurate evaluation of the kinetic constants, but may reciprocally bring useful information about the fine structure of the double layer itself. On a more practical point of view, as only irreversible waves are shifted by variation of ψ0, careful adjustement of the supporting electrolyte may improve some simultaneous polarographic determinations. A typical example is the dosage of traces of Zn in Ni, which can be carried successfully in presence of tetraethylammonium ions, which are specifically adsorbed and displace negatively the wave of Nickel only.