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A technology for extracts and uses, applied in the field of extract preparation, can solve the problems of difficult enrichment, low content, and preparation methods of Polygonum cephalosporins.
Inactive Publication Date: 2011-01-12
INST OF CHINESE MATERIA MEDICA CHINA ACAD OF CHINESE MEDICAL SCI
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Although there are many studies on the chemical constituents of Polygonum cephalosa, there is no good preparation of the effective parts of Polygonum cephalosa because of the low content of flavonoids, organic acids and other substances in Polygonum cephalica, and the difficulty in enriching them. method
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[0019] 1. Add 80 liters of water to Polygonum cephalum 10kg, reflux extraction twice, each time for 2 hours, combine the extracts, let stand overnight, and centrifuge. Macroporous adsorption resin AB-8 (10kg) on the filtrate, first wash 2 column volumes with water, discard the eluent, then wash 3 column volumes with 85% ethanol, collect the eluent, dry under normal pressure, and get flower head Polygonum extract. After testing, the extract contains 15% of total flavonoids and 2.5% of gallic acid.
[0020] 2. Add 10 times the amount of 50% ethanol to Polygonum cephalum, reflux extraction 3 times, each time for 1.5 hours, combine the extracts, recover ethanol under reduced pressure until the ethanol content is less than 10%, and apply macroporous adsorption resin NKA-9, First wash 2 column volumes with water, discard the eluent, then elute 2 column volumes with 10% ethanol, discard the eluent, then wash 3 column volumes with 80% ethanol, collect the eluent, and depressurize ...
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Abstract
The invention provides a preparation method and use of a polygonum capitatum extract. The preparation method comprises the following steps of: extracting polygonum capitatum by using water or an aqueous alcohol system, recovering ethanol and making the extracting solution pass through a macroporous absorption resin; eluting by using water or eluting by using water and low-concentration alcohol, and eluting by using high-concentration alcohol; and collecting eluant, recovering a solvent under reduced pressure, and drying to prepare the polygonum capitatum extract, wherein the content of general flavone is no less than 8 percent and the content of gallic acid is no less than 2 percent. The extract has effects of clearing away heat and reducing fire and promoting diuresis for stranguria, mainly treats pyretic stranguria, and is used for treating urinary system infection and inflammation and other diseases.
Description
technical field [0001] The invention belongs to the field of traditional Chinese medicine research, and relates to a preparation method and application of an extract. Background technique [0002] Polygonum capitatum (Polygonum capitatum Buch-Ham ex D.Don) belongs to the perennial herbaceous plant of the genus Polygonum in the family Polygonaceae. It is mainly distributed in Guangxi, Jiangxi, Guizhou, Yunnan, Sichuan, Hunan, Tibet and other regions in China, and also in northern India, Nepal, Bhutan, Myanmar and Vietnam. It often grows in flakes on hillsides, ditch sides, wet places on the edge of fields and valley wetlands, and is a commonly used medicine in minority areas. It is bitter in taste and warm in nature. It is mainly used for clearing away heat and detoxification, diuresis and treating stranguria, pyelonephritis, urolithiasis, cystitis, dysentery, rheumatic pain, bruises, urinary tract infection, sore eczema and other diseases. At present, preparations such as ...
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