Objectives： We analyzed polyphenol and antioxidant capacity in red wines Malbec, Cabernet Sauvignon, Tannat and Syrah varieties from wineries Calchaquies Valleys, in Salta, Argentine. Methods： The total polyphenols ...Objectives： We analyzed polyphenol and antioxidant capacity in red wines Malbec, Cabernet Sauvignon, Tannat and Syrah varieties from wineries Calchaquies Valleys, in Salta, Argentine. Methods： The total polyphenols was determined by UV absorption at 280 nm evaluating the D280 index. The antioxidant capacity was analyzed by absorbance measured at 520 nm and 420 nm and the color intensity and the hue was calculated by its summation by its relation. Key findings： The results presented indexes D280 （phenolic content） that ranged from 43.3 to 55.7. The antioxidant capacity is evaluate by the color intensity of red wines measuring absorbance values at 420 and 520 nm that ranged from 0.60 to 1.09. There is correlation between phenolic content and antioxidant capacity with a correlation coefficient of 0.974. Conclusions： The total polyphenol content in red wines is correlated with their antioxidant capacity. It is beneficial to health if the wine is consumed in low quantities. The Cabernet Sauvignon variety has more phenolic content than Malbec, Tannat and Syrah varieties.展开更多
文摘Objectives： We analyzed polyphenol and antioxidant capacity in red wines Malbec, Cabernet Sauvignon, Tannat and Syrah varieties from wineries Calchaquies Valleys, in Salta, Argentine. Methods： The total polyphenols was determined by UV absorption at 280 nm evaluating the D280 index. The antioxidant capacity was analyzed by absorbance measured at 520 nm and 420 nm and the color intensity and the hue was calculated by its summation by its relation. Key findings： The results presented indexes D280 （phenolic content） that ranged from 43.3 to 55.7. The antioxidant capacity is evaluate by the color intensity of red wines measuring absorbance values at 420 and 520 nm that ranged from 0.60 to 1.09. There is correlation between phenolic content and antioxidant capacity with a correlation coefficient of 0.974. Conclusions： The total polyphenol content in red wines is correlated with their antioxidant capacity. It is beneficial to health if the wine is consumed in low quantities. The Cabernet Sauvignon variety has more phenolic content than Malbec, Tannat and Syrah varieties.
