Comparative Study on Antioxidant Activity of Anthocyanins from Black Rice and European Bilberry

The objective of the present study performed a comparative analysis of the antioxidant activity of anthocyanin from black rice and bilberry. The ascorbic acid was used as a positive control. The antioxidant activities were determined by total reducing power,O₂^-·,OH·,H₂O₂,DPPH· and ABTS⁺· radical scavenging methods. The results showed that total reducing power,H₂O₂,DPPH· and ABTS⁺· radical scavenging abilities of the black rice and bilberry were better than those of the control.Furthermore,the black rice had shown the higher antioxidant activity of DPPH· and ABTS⁺· radical scavenging(IC₅₀ of 0.88 μg/mL for DPPH· and 0.75 μg/mL for ABTS⁺·). But the ability of OH· and O₂^-· radical scavenging were lower than those of control. While the scavenging ability of O₂^-· from black rice was 3.63 times of that of bilberry,and the scavenging ability of OH· was the same as that of European bilberry. Therefore,the anthocyanin of the black rice in this study had better antioxidant properties and might be considered to be prospective natural sources of antioxidant substances.