SIMULTANEOUS DETERMINATION OF DIFFUSION-COEFFICIENT AND CONCENTRATION BY CHRONOAMPEROMETRY AT A MICRODISK ELECTRODE
Two unknown values among three electrochemical values, i.e. electrode area, diffusion coefficient, and concentration, are simultaneously obtained by nonlinear regression analysis of a single chronoamperometric faradaic current curve at a microdisk electrode. The approach is an analytical application of the semi-empirical equation presented by Shoup and Szabo for the chronoamperometric response at a disk electrode. To demonstrate the usefulness and accuracy of this approach, the chronoamperometric current at a platinum disk electrode of 50 mum radius in solutions of Ru(NH3)63+, ferrocene, Fe(CN)63-, and C60, were analyzed.
- Publisher
- KOREAN CHEMICAL SOC
- Issue Date
- 1994-03
- Language
- English
- Article Type
- Article
- Keywords
DISK ELECTRODES; MICROELECTRODES; BUCKMINSTERFULLERENE; C-60; C60
- Citation
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.15, no.3, pp.209 - 213
- ISSN
- 0253-2964
- Appears in Collection
- CH-Journal Papers(저널논문)
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