Antioxidant activities and RP-HPLC identification of polyphenols in the acetone 80 extract of Salvadora persica

the extract were also investigated. Our results showed the presence of eleven compounds: caffeic acid (5.82%), rutin trihydrate (2%), trans-cinnamic acid (1.58%), gallic acid (1.53%), resorcinol (1.33%), chlorogenic acid (1.14%), quercetin dihydrate (0.67%), naphtho-resorcinol (0.48%), catechine hydrate (0.24%), p-coumaric acid (0.11%), and 3.4 dihydroxyphenylacetic acid (0.01%). The diluted acetone extract showed weak antioxidant activities comparatively to the BHT (DPPH IC50 75 µg/ml; reducing power EC50, 1940 μgml -1 and IC50= 460 µg/ml for the �-carotene bleaching test). The total antioxidant activity was estimated at 0.528 mg GAE.g -1 DW, the total phenolic content was 0.443 mg GAE.g -1 DW and the total condensed tannin were 0.39 mg EC.g -1 DW. These results confirm the wide range of the biological activities of S. persica and reinforce the use of this plant of a natural source of antioxidant compounds with benefic properties for Human health.