Separation and purification of flavonoids from Smilax glabra by macroporous adsorption resin / 中国中药杂志

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the process of separating and purifying flavonoids from Smilax glabra.</p><p><b>METHOD</b>With the yield of flavonoids as index, the optimum process of separating and purifying flavonoids from S. glabra Roxb was screened by static and dynamic adsorption tests.</p><p><b>RESULT</b>The static saturated adsorption capacity of D101 macroporous resin to flavonoids of S. glabra was 45.6 mg x g(-1) (dry resin). The optimum conditions of dynamic adsorption and elution were as that the pH, the concentration, the adsorption velocity of the extracting solution, and the adsorption capacity were 6.00 +/- 0.20, 4.2 mg x mL(-1), 2 mL x min(-1) and 15 mL, respectively. The adsorbed resin column was washed by 100 mL 60% ethanol with pH value of 8.00 +/- 0.20 at the eluting velocity of 3 mL x min(-1) after washed by 100 mL distilled water.</p><p><b>CONCLUSION</b>The flavonoids of S. glabra was able to be easily separated and purified by D101 macroporous resin under the optimum conditions above, and the recovery rate was higher than 90%. The content of obtained flavonoids reached 62.6%, which was 2 times of the content before purification.</p>