Decolorization of Crude Saposhnikovia Divaricata Polysaccharide by Resins

To select a suitable decolorizing resin for crude Saposhnikovia divaricata polysaccharide(SPS),with both the decolorization ratio and the carbohydrate reservation ratio as the indexes,the decolorization effect of crude SPS by eight different resins were studied.The results show that the order of their decolorization ratios is:D280 > D392 > 201×4 > D3520 > 201×7 > NKA-Ⅱ > NKA-9 > 001×7,and the column capacity of D280 is higher than that of D392.At their optimal loading,which is 1.2 g crude SPS per 30 g wet resin,the decolorization ratios and carbohydrate reservation ratios are 84.3%,76.4% and 80.6%,82.7%,respec-tively.The above results show that macroporous anion exchange resins are suitable for the decolorization of crude SPS.