Evaluation of the phenolic content and in vitro antioxidant potential of Bauhinia monandra Kurz (Fabaceae)

Abstract

This work was carried out to evaluate the total phenolic content and antioxidant potential (2,2-di-phenyl-1-picrylhydrazyl [DPPH] and ferric reducing antioxidant power [FRAP] methods) of Bauhinia monandra through its organs (leaves, stems and roots). The results showed fluctuating contents with a dominance in the leaves of total phytophenols in the crude hydromethanolic and selective AcOEt extracts (57.344 ± 12.35 and 48.165 ± 4.77 mg EAG/g DM, respectively) and of total flavonoids in the AcOEt extract (100.588 ± 12.06 mg EQ/g DM). The evaluation of antioxidant activity shows that the AcOEt extract of the stems is the most active with a CR50 = 23.442 µg/ml (DPPH method) and 44.34 ± 0.1 µg EVc/100 g DM and 182394.94 ± 406.09 µg EFeSO4/g DM (FRAP method).