Direct current polarography in the presence of alternating voltages. II. Irreversible systems

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Abstract
The superposition of a small alternating voltage on the normal D.C. voltage applied at the dropping mercury electrode (D.M.E.) results in the case of irreversible systems in a marked displacement of the entire D.C. wave, in contradistinction to those cases known to be reversible. Such a displacement has been interpreted in terms of an ionic picture. The cases examined were ZnO2--, Fe++, Ni++, Sb+++ in the presence of varying concentrations of Cl-, and Cd++ in the presence of varying concentrations of cyclohexanol. The effect of frequency was investigated.

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