| In order to investigate in vitro antioxidant activity of Sacha Inchi oil, the typical in vitro antioxidant test system was used to determine the scavenging ability of Sacha Inchi oil on DPPH·,·OH, O-2·, capacity of chelating Fe2+ and reducing capacity, with TBHQ as positive control. The results indicated that there was a good dose-response relationship between the in vitro antioxidant properties and the mass concentration of Sacha Inchi oil. Within the range of the test mass concentration, the maximum values of the five in vitro antioxidant indexes of Sacha Inchi oil were DPPH· scavenging rate 75.24%, ·OH scavenging rate 95.26%, O-2·scavenging rate 92.57%, capacity of chelating Fe2+92.17% and reducing capacity 1.22, respectively. In the case of the same mass concentration, the O-2· scavenging ability and capacity of chelating Fe2+ of Sacha Inchi oil were better than those of TBHQ. The IC50 of DPPH· scavenging ability, ·OH scavenging ability, O-2· scavenging ability and capacity of chelating Fe2+ of Sacha Inchi oil were 2.96, below 0.01, 0.20, 2.77 mg/mL，respectively. The above results showed that Sacha Inchi oil had stronger in vitro antioxidant activity. |
