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Components of the Net Current in Differential Pulse Polarography. Part 2. Kinetics and Adsorption
Author(s) -
Zelić Marina,
Lovrić Milivoj
Publication year - 2011
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.201000630
Subject(s) - polarography , adsorption , electrode , pulse (music) , reaction rate constant , analytical chemistry (journal) , chemistry , constant (computer programming) , kinetics , thermodynamics , component (thermodynamics) , current (fluid) , materials science , voltage , inorganic chemistry , chromatography , physics , quantum mechanics , computer science , programming language
Components of the net response in differential pulse polarography were studied theoretically, assuming gradually changing electrode rate constant or strength of the reactant adsorption. The difference between the maximum potential of the peak component and the half‐wave potential of the wave component appear as an important parameter. From its value, the electrode rate constant can be calculated even when the standard potential is not known. In a reversible process, effects of the reactant adsorption on the mentioned separation are less pronounced. The results were compared with experimentally obtained effects. For deeper insight into the applicability of this approach, additional experimentally obtained polarograms (that reflect different potential/timing parameters or changing character of the electrode process) should be studied in terms of their components.