Determination of total flavonoid and total phenol content of bugenvil bracteas (Bougainvillea spectabilis willd) and its activity as an antioxidant

A popular decorative plant, bougainvillea is planted in tropical and subtropical gardens almost everywhere on the globe. This study aims to determine the total phenol and flavonoid levels of Bractea extracts Bougainvillea spectabilis Willd and its antioxidant activity. The extraction of 1 kg of bougainvillea Bracteas produces ethanol extract (30.56g), chloroform (6.52g), ethyl acetate (6.1g), n-butanol (3.21g) and water (4.65g). Phytochemical screening showed that the extracts and fractions were positive for flavonoids in the ethanol extract and water fraction and also positive for containing polyphenols in the ethanol extract, ethyl acetate fraction, and water fraction. The ethanol extract has a total phenol content of 5.3%, and a flavonoid content of 1.02%, respectively. Antioxidant activity in the ethanol extract, fraction n- Hexane, ethyl acetate fraction, and water fraction is measured using the DPPH method and expressed by IC values50 respectively, 33.40; 120.81; 40.40; 43.00ppm. It can be concluded that bougainvillea bracts are high in phenolics and flavonoids, they may be a useful source of antioxidants for the treatment of many conditions.