Sequential column chromatographies on HPD-100 macroporous adsorption resin (MAR) and polyamide (PA) were used to purify total flavonoids from Ampelopsis grossedentata. The optimum adsorption parameters for HPD-100 MAR were determined as follows: sample concentration, 6 mg/mL;sample flow rate, 1 mL/min;and sample volume, 130 mL. Under these conditions, the percentage adsorption was 97.14%. The optimum desorption parameters were established as follows: eluent concentration, aqueous ethanol (70:30, V/V);eluent volume, 40 mL;and flow rate, 1 mL/min. Under these conditions, the percentage desorptio...