THE ANTIOXIDANT ACTIVITY OF PIGMENT EXTRACTS FROM BLACK SEED COATS OF WILD SOYBEAN

Compared with cultivated black soybeans and vitamin C, the scavenging activity on free radical and total antioxidant capacity of pigment extracts from black seed coats of wild soybean were determined by the DPPH and FRAP methods, respectively. The results showed that the antioxidant activity of pigment extracts from black seed coats of three ecological types of wild soybean were stronger than the three cultivated black soybeans. Their scavenging activity on free radical was equivalent to 30.48 %, 40.80 %, 44.81 % of vitamin C. And the total antioxidant capacity was equivalent to 27.65 % , 29.45 %, 30.12% of vitamin C.