An Evaluation on Antioxidant Activity, Total Phenolic and Total Flavaonoid Contents of Extracts from <i>Adina cordifolia</i> (Roxb.)

Abstract

In this study, in vitro antioxidant activity, total phenolic content and concentration of flavonoids of four different extracts of <i>Adina cordifolia</i> (Roxb.) were determined using spectrophotometric methods. Antioxidant activity of extracts was expressed as percentage of DPPH radicals’ inhibition and IC50 values (μg/ml). IC50 values ranged from 20.39 to 38.96 μg/ml. The total phenolic content ranged from 17.48 to 20.83 mg/g of dry weight of extract, expressed as gallic acid equivalents. The total flavonoid concentrations varied from 17.49 to 22.48 mg/g, expressed as quercetin equivalents. The significant linear correlation was confirmed between the values for the total phenolic content and antioxidant activity of plant extracts. <i>Adina cordifolia</i> (Roxb.) can be regarded as promising candidates for natural plant sources of antioxidants with high value.