The present inquiry attempts to determine the antioxidant capacity of launaea resedifolias hydroalcoholic extract which is obtained from Algerian Sahara. The antioxidant capacities of various extracts of aerial parts of L. resedifolia were estimated by using DPPH (1,1-diphenyl-2-picrylhydrazyl) radical-scavenging capacity, ferric reducing power (FRP) and total antioxidant capacity. In addition, the total phenols, flavonoids and tannins contents of various extracts were measured by using colorimetric ways, the greater content of phenols and flavonoids were registered in crude extract (6.642 ± 0.262 mg GAE/g DW and 0.929 ± 0.018 mg QE/g DW respectively), while the tannins was found in water fraction (1,246 ± 0,153 mg RE/g DW). Both capacities DPPH scavenging and ferric reducing power were found best in ethyl acetate fraction (IC50 = 403.551 µg/ml and AEAC = 0.151 mM respectively). For total antioxidant capacity, the superior capacity was observed in water fraction (EEAC = 0.149 Mm).
Key words: Launaea resedifolia ; Phenol ; Flavonoid ; Tannin ; Antioxidant capacity ; DPPH ; Reducing power.
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