Antioxidant Activities of Hexane, Ethyl acetate, Acetone and Methanol Extracts of Newbouldia Laevis

The crude extracts (n-hexane, ethyl acetate, acetone and methanol) were obtained by cold maceration method by soaking 100 g of the sample in 250 mL hexane for 72 hours with frequent agitation. All the extracts inhibited DPPH radical in a concentration of 0.1 mg/L, 0.3 mg/L, 0.5 mg/L, 0.7 mg/L, and 0.9 mg/L and methanol extract of Newbouldia laevis producing highest inhibition (which was not significantly different from vitamin C (66.57, 67.41, 71.31, 76.60 and 85.52). Results have shown that Newbouldia laevis plant have the capacity to protect or inhibit damage induced by free radical species.