The main components of astragalus extract include astragaloside IV and astragalus polysaccharide. The factory dried the raw materials of Astragalus root, washed, dried, pulverized, extracted with 10 times the amount of water, heated and boiled for three times, each time for 2 hours, combined the three extracts, concentrated the evaporated water to the extract with the specific gravity d=1.20, and let it cool. Add ethanol to the extract and stir, let it stand for precipitation, and centrifuge the precipitate; continue to add ethanol to the precipitate to stir, stand and centrifuge to obtain astragalus crude polysaccharide; finally, use a mixed solvent to remove protein and mucus components to obtain pure astragalus polysaccharide.
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