The invention discloses a method for extracting tea polysaccharides, which belongs to the field of tea deep processing, and comprises the following steps: S1 extraction: soaking tea with purified water to extract the extract solution; S2 extraction and impurity removal: adding ethyl acetate to the extract solution to extract impurities and collect water phase; S3 concentration and recovery: recovering the water phase from S2 and dissolving it; S4 filtration: passing the water solution from S3 through the membrane. After filtration, the filtrating liquid is obtained; S5 concentration and drying: after the concentration of the filtrate is concentrated to 40%, spray drying is carried out; S6 is crushed and sieved and iron removed: the solid obtained by spray drying is crushed by a crusher, the sifter is sieved, the iron is adsorbed and removed by magnets, and the powder is mixed evenly after removing iron, and then the sifting is performed and the iron is adsorbed and iron removed to produce the qualified product. In this method, tea was used as raw material, purified water was directly used for primary soaking extraction, and ethyl acetate was used to extract impurities. The disadvantages of traditional technology such as low yield, poor product quality and unstable solubility were overcome, and the extraction rate of tea polysaccharides was improved.
【技术实现步骤摘要】
一种茶多糖的提取方法
本专利技术属于茶叶深加工领域,涉及一种茶多糖的提取方法。
技术介绍
茶多糖是一类具有一定生理活性的复合多糖,实名应称茶活性多糖,它不同于茶叶中的纤维素、半纤维素、淀粉等实质性多糖。茶多糖是一种酸性糖蛋白,并结合有大量的矿质元素,称为茶叶多糖复合物,简称为茶叶多糖或茶多糖(TeaPolysaccharide)。其中蛋白部分主要由约20种常见的氨基酸组成,糖的部分主要由阿拉伯糖、木糖、岩藻糖、葡萄糖、半乳糖等,矿质元素主要由钙、镁、铁、锰等及少量的微量元素,如稀土元素等组成。茶多糖作为一种极具开发潜力的天然活性物质,其功能性研究一直是研究者关注的重点。日本学者清水岑夫报道茶多糖具有生物活性功能以来,大量茶多糖功能性研究实验证实,茶多糖具有以下多种生物活性:(1)降血糖;(2)降血脂;(3)调节免疫;(4)抗凝血,抗血栓;(5)抗氧化等。此外茶多糖还能减慢心率、增加冠脉流量和耐缺氧等作用,近些年来发现茶多糖还具有治疗糖尿病的功效。目前的茶多糖提取的方法主要有水提醇沉提取、超声波提取、微波提取、酶提取等,其中水提醇沉提取还分为热水醇沉提取、冷水醇沉提取、酸浸提法以及碱浸提法,热水水醇沉提取相对于冷水醇沉提取的提取率高,但汪东风等研究证实,茶多糖的热稳定性差;酸浸提法以及碱浸提法容易破坏多糖的结构,造成茶多糖损失;超声波提取会导致茶多糖的活性降低或失活;微波提取能耗高且温度高;酶提取法由于酶价格高导致提取成本过高;现有茶多糖的提取率最高约5%。
技术实现思路
为了解决上述现有技术存在的茶多糖的提取率过低的问题,本专利技术提供一种茶多糖的提取方法。为 ...
【技术保护点】
1.一种茶多糖的提取方法,其特征在于,包含以下步骤:S1提取:在茶叶中加入纯化水进行浸泡,得到浸提液;S2萃取除杂:在所述浸提液中加入乙酸乙酯进行萃取除杂,收集水相;S3浓缩回收:将S2所得水相进行回收赶溶;S4过滤:将S3所得水溶液过膜过滤得到滤清液;S5浓缩干燥:将所述滤清液浓缩至固含量为40%后,进行喷雾干燥;S6粉碎过筛除铁:将喷雾干燥所得固体用粉碎机粉碎,过60‑80目筛,用磁铁吸附除铁,除铁后将粉末混合均匀,再次过筛、磁铁吸附除铁后制得合格产品。
【技术特征摘要】
1.一种茶多糖的提取方法,其特征在于,包含以下步骤:S1提取:在茶叶中加入纯化水进行浸泡,得到浸提液;S2萃取除杂:在所述浸提液中加入乙酸乙酯进行萃取除杂,收集水相;S3浓缩回收:将S2所得水相进行回收赶溶;S4过滤:将S3所得水溶液过膜过滤得到滤清液;S5浓缩干燥:将所述滤清液浓缩至固含量为40%后,进行喷雾干燥;S6粉碎过筛除铁:将喷雾干燥所得固体用粉碎机粉碎,过60-80目筛,用磁铁吸附除铁,除铁后将粉末混合均匀,再次过筛、磁铁吸...
【专利技术属性】
技术研发人员:顾峰,
申请(专利权)人:成都华高生物制品有限公司,
类型:发明
国别省市:四川,51
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