Study on antioxidant activity of different parts partitioned from Prunus divaricata Ldb branches and leaves in Xinjiang

The petroleum extract,ethyl acetate extract and n- butanol extract of Prunus divaricata Ldb branches and leaves were obtained by systematic solvent extraction,and their antioxidant activities were evaluated by scavenging activity of DPPH radicals,reducing power and total antioxidant activity.The total phenolic content in the obtained extracts were measured.The results showed that the antioxidant activities of the extracts were positively correlated to their total phenolic content,it showed that total phenolic content were main factors for the antioxidant activities.Each part of extracts had antioxidant activities and similar tendency,the ethyl acetate extract displayed the strongest activity,followed by n- butanol extract and the petroleum extract.This indicated that the ethyl acetate extract and n- butanol extract were rich in antioxidant components.The ethyl acetate extract of branches had the strongest activity,remarkably higher than that of BHA. The total phenolic content from Prunus divaricata Ldb branches and leaves could be produced as natural antioxidants.