Chapter of Book
Applications of Voltammetric Analysis to Wine Products
|Author||Hernanz Vila, María Dolores
Jara Palacios, Mª José
Escudero Gilete, María Luisa
Heredia Mira, Francisco José
|Department||Universidad de Sevilla. Departamento de Química Analítica
Universidad de Sevilla. Departamento de Nutrición y Bromatología, Toxicología y Medicina Legal
|Abstract||Wine contains polyphenols that are responsible for its quality. Moreover, phenolic compounds
have antioxidant properties and benefits on human health. Cyclic voltammetry
(CV) was the first electrochemical method used for ...
Wine contains polyphenols that are responsible for its quality. Moreover, phenolic compounds have antioxidant properties and benefits on human health. Cyclic voltammetry (CV) was the first electrochemical method used for polyphenols characterization and determination of polyphenols content in wine products. Electrochemical behaviour of standard solutions of phenolic compounds has been investigated and evaluated the importance of the phenolic concentration and pH. The electrochemical parameters extracted from the voltammograms have been correlated with the antioxidant potential in wine products. In addition, CV allowed establishing differences in the antioxidant activity of wines with different addition of grape seeds. In winemaking by-products, different Ipa and Q500 values were found depending on the state of maturation of the grape pomace. On the other hand, the total flavonoids and phenolic acids contents were significantly correlated to the electrochemical parameters. Differences for the electrochemical parameters were found between by-products, being pomace and seeds which presented the greatest values of Q500. Simple regression analyses showed that voltammetric parameters are correlated to their values of lipid peroxidation inhibition by thiobarbituric acid reactive substances method. Our results open the possibility of CV as a promising technique to estimate the global antioxidant potential of wine products rich in phenolic compounds.
|Citation||Hernanz Vila, M.D., Jara Palacios, M.J.,...,Heredia Mira, F.J. (2017). Applications of Voltammetric Analysis to Wine Products. En Applications of the Voltammetry (pp. 109-128). London (United Kingdom): IntechOpen.|