In vitro Antioxidant Activity of the Extracts from Dalbergia Leaves

[Objective] To evaluate the antioxidant activity of total flavones in different extracts from Dalbergia Odarifera leaves.[Method] The four extracts were prepared by aqueous extract of Dalbergia Odarifera leaves by 3 different organic solvents petroleum ether,chloroform,ethyl acetate and water.The antioxidant activities were assessed by DPPH radical scavenging activity,superoxide radical scavenging activity,hydroxyl radical scavenging activity,peroxide scavenging activity,and nitric oxide scavenging activity,with the positive control of the antioxidant activity of ascorbic acid.The contents of total flavones were measured by Aluminum salt complex method.[Result] The pecking order of antioxidant capacity was Ethyl acetate parts Chloroform parts water extraction Petroleum ether parts,and consistent with the content of the flavonoids.[Conclusion] Antioxidant components could mainly exist in the ethyl acetate parts,the antioxidant capacity was associated with its flavonoids content.