Phytochemical constituent and antioxidant activity of extract from the leaves of Ocimum basilicum
Ocimum basilicum leaf extracts of were investigated for phytochemical constituent and antioxidant activity. Tests for tannins, steroids, terpenoids, flavonoids and cardiac glycosides were positive in both ethanolic and aqueous extracts. The ethanolic extract of O. basilicum had a DPPH scavenging activity of 85.2% at 250ÃŽÂ¼g/ml and a reductive potential of 0.79 at 100 ÃŽÂ¼g/ml. These values were comparable with those of gallic acid, 91.1% at 250 ÃŽÂ¼g/ml and ascorbic acid, 0.76 at 60 ÃŽÂ¼g/ml as standards for DPPH scavenging activity and reductive potential, respectively. These findings suggest that the rich phytochemical content of O. basilicum and its good antioxidant activity may be responsible for its popular and wide traditional use.