Preparation method for rhizoma bletillae polysaccharide

Abstract

The invention discloses a preparation method for rhizoma bletillae polysaccharide. The preparation method comprises the following steps: first, weighing rhizoma bletillae decoction pieces, performing hot-dipping extracting after water is added for soaking, refrigerating, filtering, and performing vacuum concentrating after the extracting liquid is de-coloured by using AB-8 resin; then performing alcohol precipitation, refrigerating, filtering, removing ethyl alcohol by nitrogen flow, and freezing and drying to obtain white and dry rhizoma bletillae polysaccharide, wherein the content of the rhizoma bletillae polysaccharide is about 85 percent, and the water solubility is good. According to the preparation method, the rhizoma bletillae polysaccharide is extracted by adopting a hot water dipping method; rhizoma bletillae polysaccharide degradation and high impurity content caused by overheating when the rhizoma bletillae polysaccharide is extracted according to a water decocting method are avoided; the problem that the requirements of deep research and development of modern medical treatment fields and novel biological materials cannot be met because of low rhizoma bletillae polysaccharide extracting efficiency, high impurity, poor colour and lustre in the conventional water decocting and alcohol precipitating method is solved; the problem that the rhizoma bletillae polysaccharide is in short supply at present is also solved.

Description

technical field

[0001] The invention belongs to the technical field of medicine, and in particular relates to a preparation method of Baiji polysaccharide. Background technique

[0002] Bletillata polysaccharide (BSP) is a water-soluble polymer viscous polysaccharide extracted from the traditional Chinese medicine Bletilla striata, also known as Bletillata glucomannan. It is composed of D-glucose and D-mannose according to approximately It is composed of a ratio of 1:4, and is polymerized by β-glycosidic bonds to form a spatial helical structure; its average molecular weight is 65,000 to 150,000 kDa, and it can be dissolved in water to form a viscous gel, which has good bioadhesion. It is extremely safe, and the toxicological safety evaluation shows that the polysaccharide of Baiji is safe, non-irritating and non-allergic. Therefore, it has a wide range of uses: ① It can be used as food ingredients or additives, and is an excellent natural food thickener. ②The polysaccharid...

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