Reducing Antioxidant Capacity Evaluated by Means of Controlled Potential Electrolysis |
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Authors: | Raquel Oliveira Juliana Marques Fátima Bento Dulce Geraldo Paula Bettencourt |
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Affiliation: | Department of Chemistry, Universidade do Minho, Campus de Gualtar 4710–057, Portugal tel: +351?253604399 |
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Abstract: | An analytical method suitable for an antioxidant sensor is presented following the response of these substances to an extensive oxidation imposed by electrochemical means. The electrochemical assay simulates the action of a reactive oxygen species (ROS) by means of electrolyses carried out at a potential which is settled at the formal potential of the ROS. The antioxidant activities of trolox and ascorbic, gallic and caffeic acids and of mixtures of these antioxidants were estimated from the charge required for the complete oxidation of the antioxidants from assays where the oxidative attack by O2 and by O2.? were simulated. |
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Keywords: | Antioxidant activity Electrolysis Reactive oxygen species Sensors |
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