Antioxidant capacity of different chaenomeles in Tibet
Chaenomeles in Tibet contain polyphenols, flavonoids and terpenes which have a certain antioxidant activity. The antioxidant activity of six batches of chaenomeles in Tibet was investigated by chemiluminescence. The bioactivator of chaenomeles were extracted by ethanol. The result showed that the chaenomeles extracts had good scavenging capacity activity on O2-, HO· and H2O2, but different samples had different antioxidant activity which were related to its components. The antioxidant activity of most chaenomeles extracts was better than Vc. And the IC50 of the best antioxidant activity were 0.1841 mg/mL, 3.07×10-3 mg/mL and 6.76×10-4 mg/mL, respectively. This shows that the chaenomeles extracts have good antioxidant activity. The co-relationship analysis showed that there were high comparison between total phenols content and O2-, HO· scavenging activity, total flavonoid content and HO· scavenging activity which has significant difference.