青砖茶水提多糖与茶渣碱提多糖综合提取工艺优化及乳液负载体系研究

摘要/Abstract

摘要： 青砖茶是湖北省具有代表性的地域标志性物产，尽管产量较高，但其市场价值有待提升。茶多糖作为粗老茶叶中含量较高的天然活性物质，已被证实具有多种生物活性，因此从青砖茶中提取茶多糖具有独特优势。以湖北特有的已渥堆未压砖的青砖茶为对象，采用响应面法优化了水提与碱提两种提取工艺，分别获得了两种不同类型的茶多糖。其中，碱提茶多糖是水提后从茶渣中进一步提取而得，以提高原料利用率。对这两种茶多糖的理化特性（如分子量、抗氧化活性、单糖组成和粒径电位等）进行了比较分析，并探索了它们在乳液载体中的应用潜力，重点考察了乳液在10 d储存期间的稳定性和负载效果。

关键词: 青砖茶, 多糖, 提取, 响应面法, 乳液负载

Abstract: Qingzhuan tea is a regional iconic product of Hubei Province. Although the yield is high, its market value needs to be improved. Tea polysaccharide, as a natural active substance with high content in crude old tea, has been proved to have a variety of biological activities. Therefore, it has unique advantages to extract tea polysaccharide from Qingzhuan tea. In this study, the response surface method was used to optimize the two extraction processes of water extraction and alkali extraction, and two different types of tea polysaccharides were obtained. Among them, the alkali extraction of tea polysaccharide is obtained by further extraction from tea residue after water extraction, so as to improve the utilization rate of raw materials. Subsequently, the physicochemical properties (such as molecular weight, antioxidant activity, monosaccharide composition and particle size potential) of these two tea polysaccharides were compared and analyzed, and their application potential in emulsion carriers was explored. The stability and loading effect of the emulsion during ten days of storage were investigated.

中图分类号:

郭瑜¹, 肖刘雨², 杜秋怡², 田野³, 韩宇². 青砖茶水提多糖与茶渣碱提多糖综合提取工艺优化及乳液负载体系研究[J]. 茶叶科学.

GUO Yu¹, XIAO Liuyu², DU Qiuyi², TIAN Ye³, HAN Yu². Study on Comprehensive Extraction Process Optimization and Emulsion Loading System of Water-extracted Polysaccharides from Qingzhuan Tea and Alkali-extracted Polysaccharides from Tea Residue[J]. Journal of Tea Science.

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