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Metal ion chelating activity of T. cordifolia stem extracts. Phytochemicals present in sample were extracted with petroleum ether (PE), benzene (BZ), chloroform (CH), ethyl acetate (EA), acetone (AC), ethanol (ET), and water (AQ) as described in Section 2. Metal ion chelating activity of extracts was measured at different concentrations (10–40 μg/mL) and absorbance was recorded at 562 nm. The results are expressed as mean ± SD of three replicates (P < 0.05).
