机构地区: 广西大学糖业工程技术研究中心
出 处: 《食品与发酵工业》 2004年第6期42-45,共4页
摘 要: 通过采用分级超滤的方法以不同的分子质量范围对右旋糖酐粗品进行分离纯化 ,并分析右旋糖酐在不同分子质量范围内的分布。结果表明 ,分级超滤在不添加有机溶剂的前提下能更有效地控制右旋糖酐产品的分子质量分布 ,能够取代传统的分级乙醇沉淀法。基于质量衡算 。 Raw dextran was separated and purified by multi stage ultrafiltration according to the different ranges of molecular weight. The molecular weight distribution of substrates was analyzed It was shown that multi stage ultrafiltration was effective in controlling molecular weight ranges of the finished products without using any organic solvent, and could be substituted for traditional alcohol precipitation in refining raw dextran The analysis of molecular weight distribution of raw dextran achieved a high accuracy based on the equation of mass conservation