The spectroabsorptiometric and voltammetric behavior of malvin in buffered solutions and its antioxidant properties
Author(s) -
Lj. M. Ignjatović,
Jasmina M. Dimitrić-Marković,
Dragan Marković,
Jelisaveta M. Baranac
Publication year - 2002
Publication title -
journal of the serbian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.227
H-Index - 45
eISSN - 1820-7421
pISSN - 0352-5139
DOI - 10.2298/jsc0201053i
Subject(s) - chemistry , antioxidant , redox , buffer solution , absorption spectroscopy , absorption (acoustics) , quercetin , molecule , aqueous solution , electrode , voltammetry , inorganic chemistry , electrochemistry , cyclic voltammetry , analytical chemistry (journal) , chromatography , organic chemistry , materials science , physics , quantum mechanics , composite material
In the present work the structural transformations of malvin in aqueous acetate buffer solutions were investigated over a wide pH range under in vitro conditions using electronic absorption spectroscopy. In addition to the spectroabsorptiometric investigation, the voltammetric behavior and the mechanism of the redox process of this molecule were studied, in order to define its antioxidant properties. The electronic absorption spectra reveal that the structural changes of malvin, caused by changes in the pH of the medium, lead to changes in the voltammetric behaviour of this molecule. The dependence of the oxidation potential of malvin on pH, which can be explained by the presence of different electroactive molecular structures of malvin at different pH values, indicates different mechanisms of the electrode process. The voltammetric activity of malvin is compared semiquantitatively with the voltammetric activity of a standard synthetic antioxidant, BHA, and a natural antioxidant, quercetin.
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