Application of Elimination Voltammetry to the Electroanalysis of an Adsorbed Substance

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Authors	TRNKOVÁ Libuše KIZEK René DRAČKA Oldřich
Year of publication	2000
Type	Article in Proceedings
Conference	Electroanalysis ESEAC 2000 SEAC
MU Faculty or unit	Faculty of Science
Citation
Field	Electrochemistry
Keywords	Linear scan voltammetry; Elimination voltammetry; Adsorption
Description	In the elimination voltammetry with a linear scan rate (EVLS), elimination of the selected particular currents from the linear scan voltammetry results is achieved by an elimination function formed by a linear combination of the total currents measured at different scan rates.Theoretical curves of an irreversible current with adsorbed substance being electroactive were calculated for three elimination functions: A - the function eliminating Ik and Ic and conserving Ir , B - the function eliminating Ic and Ir , conserving Ik , and C - the function eliminating Ir and Ik and conserving Ic, where Ic , Ir , and Ik are the charging current, the reversible diffusion current, and the kinetic current, respectively. A larger difference between diffusion and adsorption was exhibited by the elimination function A. It provides a substantial increase in resolution and sensitivity as compared to the linear scan voltammetry current peak and clearly marks the adsorption.
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