Drop life-time dependence of current density in differential pulse polarography

doi:10.1016/0368-1874(85)85484-8

Journal of Electroanalytical Chemistry and Interfacial Electrochemistry

Volume 183, Issues 1–2, 25 February 1985, Pages 107-122

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Abstract

Differential pulse polarographic (DPP) measurements of the reduction of Cd²⁺, Zn²⁺, Cu²⁺ and Ni²⁺ ions on a DEM with various drop life-times were performed. The dependence of the reduction current density on the ratio between the pulse duration and the drop life-time was analysed. The increase of this ratio increases the response density of irreversible redox reactions, but decreases the response of reversible or quasi-reversible reactions. The effect if pronounced in DPP on the vibrating dropping mercury electrode as well as in differential normal pulse voltammetry (DNPV) and the results presented serve for the optimisation of their excitation signal forms. The observed change in current responses of irreversible redox reactions could improve the analytical sensitivity of DNPV significantly.

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^☆: Taken partially from the Ph.D. thesis of M.L., University of Zagreb, 1983.

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Drop life-time dependence of current density in differential pulse polarography☆

Abstract

J. Electroanal. Chem.

Anal. Chem.

Am. Lab.

Bull. Chem. Soc. Jpn.

Collect. Czech. Chem. Commun.

Croat. Chem. Acta

Croat. Chem. Acta

J. Electroanal. Chem.