Resistance to oxidation of white wines assessed by voltammetric means |
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| Authors: | Rodrigues Astride Silva Ferreira A C Guedes de Pinho Paula Bento Fátima Geraldo Dulce |
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| Institution: | Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Porto, Portugal. |
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| Abstract: | This work concerns the development of a methodology suited to measure the resistance to oxidation of white wines by cyclic voltammetry. The voltammetric responses of several white wines of different origin and age were analyzed in the oxidation potential range (0.2-1.2 V vs SCE). Currents measured at fixed potentials were correlated to the concentration of ascorbic acid, SO2, and total phenolics. A forced degradation study was monitored by cyclic voltammetry; from plots of current versus time, the consumption rates of oxidizable species in wine were estimated. |
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