发酵液中透明质酸提取纯化工艺的研究
2017-03-29宋磊孟国庆郭燕风王传宝王宜磊
宋磊+孟国庆+郭燕风+王传宝+王宜磊



摘要:本研究利用乙醇初步提取发酵液中透明质酸,确定最佳提取方案为乙醇体积分数60%,洗涤次数为两次。然后,以透明质酸含量为指标,在单因素试验的基础上,采用根据Box-Behnken原理设计的响应面法优化透明质酸纯化工艺。方差分析和交互作用分析表明,最佳纯化工艺为NaCl浓度45 g/L,温度55℃,pH值9.6,在此工艺条件下,透明质酸含量为93.71%。本工艺所生产的透明质酸纯度較高,符合化妆品、医药行业标准,具有广泛的应用价值。
关键词:透明质酸;发酵液;分离纯化;响应面
中图分类号:TS218文献标识号:A文章编号:1001-4942(2017)03-0134-06
AbstractIn this research, the hyaluronic acid was preliminarily extracted from fermentation broth using alcohol. The best extraction parameters were ethanol volume fraction of 60% and washing for two times. Using the content of hyaluronic acid as indicator, single-factor experiments were performed. Then the response surface analysis based on Box-Behnken experimental design was carried out to optimize the purification process of hyaluronic acid. Through analysis of variance and interaction, the optimal purification process was NaCl additive amount of 45 g/L, temperature of 55℃ and pH value of 9.6. Under the optimized conditions, the actual content of hyaluronic acid reached up to 93.71%. By this process, the content of hyaluronic acid was higher, which conformed to the stands of cosmetic and pharmaceutical industries, so it had extensive application value.
KeywordsHyaluronic acid; Fermentation broth; Separation and purification; Response surface
透明质酸(hyaluronic acid,HA)是一种高分子量的酸性黏多糖,由N-乙酰葡萄糖胺和葡萄糖醛酸通过β-1,4和β-1,3糖苷键反复交替连接而成[1],由于其独特的流变学特性、黏弹性、保湿性以及良好的生物相容性,透明质酸在化妆品、医学领域都有广泛的应用[2]。透明质酸用于食品领域还处于起步阶段。近年来国内外关于HA口服后吸收、代谢和功效的研究越来越多,大量科学证据证明了其功效。特别是2008年5月,国家卫生部按照《新资源食品管理办法》的规定发布相关公告,批准透明质酸钠作为一种新资源食品用于保健食品原料。这一公告的发布必将进一步推动HA在我国保健食品中的应用。
微生物发酵法是目前透明质酸的主要生产方式,而下游分离纯化工艺是获得高纯度HA的关键环节,也是制约多数企业生产高标准透明质酸的瓶颈。根据透明质酸国家质量标准和行业标准,成品中热源蛋白质含量越低,透明质酸含量越高,产品质量越高。……
