In the present study, vitamin C and phenolic acids were not
analyzed in the present experiment. However, in Brazil the vitamin C
contents of Vitis grapes were from 4.6 to 17.92 mg 100 g−1 in integral
juice grape (Santana, Siqueira, Lacerda, & Lima, 2008). Results of
different parts of the varieties Isabel, Brazil, Niagara, and Benitaka
were not found in the literature. Thereby, the phenolic acids and
vitamin C may have contributed in the inhibition of DPPH (Table 3)
and phenolic compounds concentration (Table 4).