Study on decolorization of maize silk polysaccharide using macroporous resin

Maize silk polysaccharide solution was decolorized using four macroporous adsorption resins and four macroporous anion exchange resins.The decolorization rate and retention rate of polysaccharide were analyzed in different resins.The results revealed that the resins AB-8,D392 and D315 had higher decolorization rates and retention rates of polysaccharide than other resins in silk polysaccharide solution,D315 was better than D392 and AB-8.The optimum conditions of decolorization using resins were as follow:D315 used with the concentration of 0.5g/mL,pH 6.0 under the temperature 45℃.Under the optimum formula,the decolorization rate and retention rate of polysaccharide of D315 were 85.4% and 76.8%,respectively.The decolorization rate of polysaccharide was inversely proportional to retention rate of polysaccharide in some degree.It was suitable for the evaluation on decolorization effects of polysaccharide that the decolorization rate of polysaccharide was regarded as the primary index and the retention rate of polysaccharide as the secondary index.