石莼硫酸多糖的分离纯化及结构解析

Separation and Purification of Polysaccharides Sulfate from Ulva lactuca and Its Structure Analysis

目的:研究石莼硫酸多糖的分离纯化条件并对其结构进行解析。方法:对石莼水溶性硫酸多糖的分离、纯化条件进行优化,用苯酚-硫酸法测定粗多糖中多糖的含量;高效凝胶色谱测定多糖分子量;红外光谱和碳谱分析多糖结构。结果:石莼硫酸多糖最佳提取条件为材料粉碎20目,用20倍量水85℃煎煮3次,每次2h。多糖含量为22.64%,分子量为1156112。所得可溶性多糖结构中主要含有β-葡糖醛酸和鼠李糖2种单糖,且多糖中含有大量的硫酸根。结论:本方法操作简便、结果稳定,可为工业生产提供理论依据。

OBJECTIVE：To study the separation and purification of polysaccharides sulfate from Ulva lactuca,and to analyze its structure.METHODS：The separation and purification method of polysaccharides sulfate from U.lactuca was optimized.The content of polysaccharides in polysaccharides sulfate was determined by phenyl-sulfuric acid method.The molecular amount of polysaccharides was determined by HPGC.The structure of polysaccharides was analyzed by IR and ^13C-NMR.RESULTS：The optimal extraction condition of polysaccharides sulfate from U.lactuca were crashed materials 20 mesh sieve,20-fold water,decocting 3 times at 85 ℃,2 hours each time.The content of polysaccharides was 22.64% and molecular amount was 1 156 112.Soluble polysaccharides mainly contained β-glucuronic acid,rhamnose and plenty of sulfate radical.CONCLUSION：The method is simple and stable,which provides theoretic basis for production of polysaccharides sulfate from U.lactuca.