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Polarography
About: Polarography is a research topic. Over the lifetime, 4772 publications have been published within this topic receiving 75478 citations.
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23 citations
TL;DR: In this article, the currentvoltage curves were recorded by means of a controlled-potential polarograph capable of measuring cell currents up to 5 mA and providing scan-rates from 50 mV/min to 10 V/min.
23 citations
TL;DR: In this paper, the authors describe a novel type of working electrode for use in voltammetry and polarography, the renewable silver liquid amalgam film-modified silver solid amalgam annular band electrode (AgLAF-AgSAE).
23 citations
TL;DR: The cephalosporin cefepime has been studied by adsorptive stripping voltammetric on the hanging mercury drop electrode, followed by linear sweep voltammetry (staircase) and differential pulse polarography has been applied to determination in human serum.
23 citations
TL;DR: In this paper, the effect of halide ions on the electrode reaction of Zn(H) appears to be due to a change of electrode surface resulting from the adsorption of the halide ion on the mercury electrode.
Abstract: The Polarographie reduction waves of Zn(U) in various solutions were analysed according to the theoretical equation for quasi-reversible currentpotential curves derived by Matsuda. In solutions of 1 M NaClOt or 1 M KNOs, the whole of the reduction wave of (11) can be explained approximately in terms of the kinetic parameters obtained by the above method. This is not the case, however, for the reduction in solutions containing halide ions. The effect of halide ions on the electrode reaction of Zn(H) appears to be due to a change of electrode surface resulting from the adsorption of the halide ions on the mercury electrode. From the present experimental results the following mechanism was proposed for the electrode reaction of Zìì(II) at the dropping mercury electrode in the solutions containing halide ions: the overall faradaie current is determined by two simultaneous reactions in parallel, i.e., one which proceeds at the naked electrode surface and the other which proceeds at that part of the electrode surface which is covered by the adsorbed halide ions. The standard rate constant hs and the cathodic transfer coefficient of the former are (2.3 ± 0.2) X 10~3 cm./sec. and 0.47 ± 0.02, respectively. The fact that polarographically reversible waves are obtained in solutions of 1 M KI or 5.25 M CaCl2 indicates that the rate constant of the electrode reaction at the covered electrode is much larger than at the naked electrode.
23 citations