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Redox kinetics in cathodic stripping square‐wave voltammetry
Author(s) -
Lovrić Milivoj,
Mlakar Marina
Publication year - 1995
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140071205
Subject(s) - redox , chemistry , kinetics , voltammetry , cathodic stripping voltammetry , stripping (fiber) , analytical chemistry (journal) , reaction rate constant , inorganic chemistry , cyclic voltammetry , square wave , electrochemistry , electrode , materials science , chromatography , physics , quantum mechanics , composite material , voltage
Several redox systems with reactants which are immobilized at the electrode surface (EuSal complex, Se IV and Se IV in the presence of Cu II , cysteine and p ‐nitrophenol) were studied by square‐wave voltammetry to examine whether their redox kinetics can be measured by using the phenomenon of the ‘quasireversible maximum’. This is explained in detail. The following standard rate constants are obtained: EuSal complex k s = 720 ± 31 s −1 , Se IV /Cu II , log [ k s /(cms −1 )] = 0.94 ± 0.9, cysteine, log [ k s /(cms −1 )] = 0.6 ± 0.9 and p ‐nitrophenol, k s > 1200 ± 50 s −1 .