Extract of polysaccharide of lithospermum erthrorhizon and composition containing same and use thereof
A technology of comfrey polysaccharide and extract, applied in the field of medicine
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Embodiment 1
[0129] Example 1 Preparation Example of Lithospermum Polysaccharide
[0130] Take 50g of comfrey, pulverize, add 15 times the amount of water, and extract 3 times at 100°C under reflux for 1 hour each time. The extract is concentrated to 90mL, cooled, and under rapid stirring, 95% ethanol is added to make the alcohol content reach 80%, then place at room temperature for more than 24 hours, suction and filter the precipitate to obtain the alcohol precipitation product, then dissolve the precipitate in 100 mL of distilled water, heat at 60°C to fully dissolve it, centrifuge at 3000 rpm for 15 minutes, and then filter and discard To remove the precipitate, add 95% ethanol to the obtained solution to make the alcohol content reach 80%, and then leave it for more than 24 hours, and then filter with suction to obtain the second alcohol precipitation product. Combine the two alcohol precipitation products to obtain comfrey polysaccharide Extract: Add the dried comfrey polysaccharide ext...
Embodiment 2
[0131] Example 2 Preparation Example of Lithospermum Polysaccharide
[0132] Take 50g of comfrey, pulverize, add 15 times the amount of water, and extract 3 times at 100°C under reflux for 1 hour each time. The extract is concentrated to 90mL, cooled, and under rapid stirring, 95% ethanol is added to make the alcohol content reach 80%, then place at room temperature for more than 24 hours, suction and filter the precipitate to obtain the alcohol precipitation product, then dissolve the precipitate in 100 mL of distilled water, heat at 60°C to fully dissolve it, centrifuge at 3000 rpm for 15 minutes, and then filter and discard To remove the precipitate, add 95% ethanol to the obtained solution to make the alcohol content reach 80%, and then leave it for more than 24 hours, and then filter with suction to obtain the second alcohol precipitation product. Combine the two alcohol precipitation products to obtain comfrey polysaccharide Extract.
Embodiment 3
[0133] Example 3 Preparation Example of Lithospermum Polysaccharide
[0134] Take comfrey, reflux for extraction, concentrate the extract, cool it, add ethanol, settle with alcohol, stand still, suction and filter the precipitate to obtain the alcohol precipitated product, then dissolve the precipitate in water, heat to fully dissolve it, centrifuge, Then the precipitate is removed by suction filtration, ethanol is added to the obtained solution, alcohol precipitation, standing, and suction filtration to obtain the second alcohol precipitation product, and the two alcohol precipitation products are combined to obtain the comfrey polysaccharide extract.
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