Dendrobium officinale polysaccharide and preparation method thereof

Abstract

The invention discloses dendrobium officinale polysaccharide and a preparation method thereof. The dendrobium officinale polysaccharide comprises dendrobium officinale roots, the dendrobium officinaleroots are subjected to a water extraction and alcohol precipitation method to extract crude polysaccharide, separation and purification methods such as repeated freezing and thawing, H2O2 decoloration, ultrafiltration, dialysis and the like are combined to respectively obtain two kinds of dendrobium officinale polysaccharide DOP-1 and DOP-2 with uniform molecular weight. Due to the fact that theviscosity of DOP-2 is lower than that of DOP-1, the 2D nuclear magnetic detection related peak response is good, DOP-1 and DOP-2 are smashed after multiple determination, then water at the temperatureof 220 DEG C is added for soaking and heating, heating is stopped when the DOP-1 and the DOP-2 are dispersed, residues in the DOP-1 and the DOP-2 are filtered, a concentrated solution is extracted, clear liquid floating on the concentrated solution is removed through a water extraction and alcohol precipitation method, and then the concentrated solution is precipitated and dried at high temperature to finally obtain the dendrobium officinale polysaccharide, so that the sugar content of the dendrobium officinale is increased, more raw materials are saved in the preparation process, and the reaction rate is effectively increased through hydroxyl free radicals and superoxide anions.

Description

technical field [0001] The invention belongs to the technical field of dendrobium officinale polysaccharides, in particular to a dendrobium officinale polysaccharide and a preparation method thereof. Background technique [0002] Dendrobium officinale is slightly cold in nature, sweet and light in taste. It has the effects of nourishing yin and clearing heat, nourishing stomach and promoting body fluid. It can be used to treat acute and chronic pharyngitis, chronic bronchitis, tuberculosis, hyperthyroidism, diabetes, chronic hepatitis, chronic atrophic gastritis, immune function syndrome and cancer radiotherapy and chemotherapy conditioning with yin deficiency syndrome, and can strengthen the old disease resistance. [0003] However, the existing technology is not only inefficient when extracting the sugar inside Dendrobium officinale, but also easily causes material loss during the extraction process, which increases the cost. Therefore, it is necessary to improve the pr...

AI Technical Summary

Problems solved by technology

[0003] However, the existing technology is not only inefficient when extracting the sugar inside Dendrobium officinale, but also easily causes material loss during the extraction process, which increases the cost.