Effects of Maceration Duration on the Phenolic Composition and Antioxidant Capacity of ‘Teran’ (Vitis vinifera L.) Wine

Effects of maceration duration on the phenolic composition and antioxidant capacity in red grapevine variety ‘Teran’ (Vitis vinifera L.) was investigated in this study. Total phenolics, flavonoids, nonflavonoids, individual and total anthocyanins, vanillin index and antioxidant capacity measured by DPPH, ABST and FRAP methods were determined in ‘Teran’ wines during five different skin maceration periods (3, 7, 12, 17 and 21 days). Th e highest increase in the concentration of the most phenolic compounds and antioxidant capacity was obtained between the 3rd and 7th day of maceration. Prolonging the maceration from 7 to 21 days did not lead to significantly higher concentrations of total phenolics, flavonoids, nonflavonoids, total anthocyanins and antioxidant capacity measured with ABTS and FRAP methods. It is concluded that maceration duration of seven days is the most appropriate in order to obtain high concentrations of total phenolics and anthocyanins and high antioxidant capacity of ‘Teran’ wines.