食品科学 ›› 2020, Vol. 41 ›› Issue (8): 91-99.doi: 10.7506/spkx1002-6630-20190408-095

• 生物工程 • 上一篇    下一篇

乙醇-硫酸铵双水相萃取紫色红曲菌发酵液中的红曲色素及其稳定性分析

孔维宝,杨树玲,杨洋,陈冬,郭保民,张爱梅,牛世全   

  1. (1.西北师范大学生命科学学院,甘肃 兰州 730070;2.金徽酒股份有限公司,甘肃 陇南 742500)
  • 出版日期:2020-04-25 发布日期:2020-04-20
  • 基金资助:
    国家自然科学基金地区科学基金项目(31360192);陇原青年创新创业团队项目

Extraction and Stability of Monascus Pigments from Fermentation Broth of Monascus purpureus YY1-3 Using Ethanol/Ammonium Sulfate Aqueous Two-Phase System

KONG Weibao, YANG Shuling, YANG Yang, CHEN Dong, GUO Baomin, ZHANG Aimei, NIU Shiquan   

  1. (1. College of Life Science, Northwest Normal University, Lanzhou 730070, China; 2. Jinhui Wine Co. Ltd., Longnan 742500, China)
  • Online:2020-04-25 Published:2020-04-20

摘要: 建立一种采取乙醇-硫酸铵双水相体系,从紫色红曲菌YY1-3菌株发酵液中简单、高效萃取红曲色素(Monascus pigments,MPs)的方法,利用薄层色谱(thin layer chromatography,TLC)分析提取液的色素成分,并考察了该菌株产红曲色素的稳定性。结果表明:当萃取体系中添加质量分数16%的乙醇和28%的硫酸铵时,MPs的分配系数与回收率达到最大,分别为171.91和98.13%;当上相萃取液-乙醇体积比为1∶0.5时,可有效分离回收上相中的硫酸铵;TLC分析结果表明,萃取液中有6 种主要色素组分,其中以红曲红和红曲黄色素为主;色素稳定性实验结果表明,在避光、pH 4~8、25~65 ℃以及常规金属离子和食品添加剂溶液中,该菌株所产的MPs具有良好的稳定性。

关键词: 红曲色素, 紫色红曲菌, 提取, 双水相体系, 稳定性

Abstract: Monascus pigments (MPs) were extracted from the fermentation broth of Monascus purpureus YY1-3 in a simple and efficient way using an ethanol/ammonium sulfate aqueous two-phase system (ATPS). Thin layer chromatography (TLC) was used to analyze the composition of the MPs and their stability was also tested. The results showed that when the ATPS was composed of 16% (m/m) ethanol and 28% (m/m) ammonium sulfate, the maximum partition coefficient and recovery rate of MPs of 171.91 and 98.13% were obtained respectively. When the volume proportion of the top phase extraction solution-ethanol was 1:0.5, ammonium sulfate could be effectively removed from it. TLC showed that the extract was composed of six components, mainly Monascus red and yellow pigments. The MPs were stable in darkness, pH 4–8 and 25–65 ℃, as well as in the presence of common metal ions and food additives.

Key words: Monascus pigments, Monascus purpureus, extraction, aqueous two-phase system, stability

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