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 Example of preparation of comfrey polysaccharide
[0130] Take 50g of comfrey, pulverize it, add 15 times the amount of water, reflux and extract at 100°C for 3 times, each time for 1 hour, concentrate the extract to 90mL, cool, and add 95% ethanol under rapid stirring to make the alcohol content reach 80%, then put it at room temperature for more than 24 hours, filter the precipitate to obtain the alcohol precipitation product, then dissolve the precipitate in 100mL of distilled water, heat it at 60°C to fully dissolve, centrifuge at 3000 rpm for 15 minutes, and then discard it by suction filtration To remove the precipitate, add 95% ethanol to the obtained solution to make the alcohol content reach 80%, then place it for more than 24 hours, and filter with suction to obtain the second alcohol precipitation product, and combine the two alcohol precipitation products to obtain comfrey polysaccharide Extract: Add 100 mL of absolute ethanol to the dried comfrey ...
Embodiment 2
[0131] Take 50g of comfrey, pulverize it, add 15 times the amount of water, reflux and extract at 100°C for 3 times, each time for 1 hour, concentrate the extract to 90mL, cool, and add 95% ethanol under rapid stirring to make the alcohol content reach 80%, then put it at room temperature for more than 24 hours, filter the precipitate to obtain the alcohol precipitation product, then dissolve the precipitate in 100mL of distilled water, heat it at 60°C to fully dissolve, centrifuge at 3000 rpm for 15 minutes, and then discard it by suction filtration To remove the precipitate, add 95% ethanol to the obtained solution to make the alcohol content reach 80%, then place it for more than 24 hours, and filter with suction to obtain the second alcohol precipitation product, and combine the two alcohol precipitation products to obtain comfrey polysaccharide Extract.
Embodiment 3
[0132] Example 3 Example of preparation of comfrey polysaccharide
[0133] Take comfrey, reflux for extraction, concentrate the extract, cool, add ethanol, ethanol precipitation, stand still, suction filter to get the precipitate, and obtain the product of alcohol precipitation, then dissolve the precipitate in water, heat it to fully dissolve, centrifuge, Then, the precipitate was discarded by suction filtration, and ethanol was added to the obtained solution, alcohol precipitation, standing, and suction filtration to obtain the second alcohol precipitation product, and the two alcohol precipitation products were combined to obtain the comfrey polysaccharide extract.
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