Abstract
The activities of tannins from various plant extracts prepared by electroextraction were studied in a reaction with oxygen radicals during cathodic electroreduction of oxygen in an aqueous medium on a dropping mercury electrode. The value used for assessment of the antiradical activity of the study extracts was the parameter ∆φ – the displacement of the potential of the O2 electroreduction halfwave in the presence of extract as compared with the wave without extract. The greatest level of antiradical activity was seen with snakeweed and burnet root extracts, which have high contents of polymeric phenols. This method for assessing antiradical activity provides for a targeted approach to selecting tannin extracts as biologically active additives and as food antioxidants for dry products and liquid components such as syrups, vitamin juices, infusions, and purees.
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