Resistance to oxidation of white wines assessed by voltammetric means.
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.
Rodrigues
Astride
A
Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Porto, Portugal.
Silva Ferreira
A C
AC
Guedes de Pinho
Paula
P
Bento
Fátima
F
Geraldo
Dulce
D
D001205:Ascorbic Acid / Q000032:analysis; D004553:Electric Conductivity; D010084:Oxidation-Reduction; D010636:Phenols / Q000032:analysis; D013458:Sulfur Dioxide / Q000032:analysis; D013997:Time Factors; D014920:Wine / Q000032:analysis*
D010636:Phenols; D013458:Sulfur Dioxide; D001205:Ascorbic Acid