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76 .   The analysis of chromatic and antioxidant properties of some romanian red wines

Authors: Mariana-Atena Poiana, A. Dobrei, Diana Moigradean


Abstract:

The goal of this study was to investigate the antioxidant and chromatic properties of red wines processed in famous Romanian vineyards. Were analyzed bottled red wines, from 2003 harvesting year in the vineyards: Recas, Minis, Murfatlar and Calugareasca Valley. From Recas, Minis and Murfatlar were analyzed Cabernet Sauvignon, Merlot and Pinot Noir red wines; from Calugareasca Valley: Cabernet Sauvignon, Merlot, Black Peak and red wines from varieties mixtures: Merlot&Black Peak and Cabernet Sauvignon&Merlot. Antioxidant profile of red wines was evaluated through total antioxidant capacity. The chromatic properties were analyzed in terms of color composition, chromatic parameters, total anthocyanins and polyphenols content. It was established correlations between chromatic and antioxidant characteristics. The highest values of color intensity were obtained for Cabernet Sauvignon wine and the smallest for Pinot Noir. The values of color tint were situated in the range of 0.6-1.0 for red shade wines and higher than 1.0 in case of bricky colored wines. The highest values for total antioxidant capacity, polyphenols and monomeric anthocyanins were found in Cabernet Sauvignon wine, followed by Merlot and Pinot Noir. Between antioxidant capacity and polyphenols content it was established a linear dependence. The color composition of analyzed red wines is influenced by the grape variety and viticultural region

Keywords: anthocyanins, chromatic parameters, polyphenols, red wines, total antioxidant capacity

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