Extract of dogbane leaf with finger print and preparation and analytical method thereof

A technology of fingerprints and extracts, which is applied to extracts mainly containing flavonoid active substances and its preparation, an extract with fingerprints and its preparation field, which can solve the problem of long working hours, high cost and incomplete reflection Extract quality and other issues, to achieve the effect of simple operation and easy industrial production
CN101357147AInactive Publication Date: 2009-02-04周亚球 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
周亚球
Publication Date
2009-02-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

A dogbane leaf extract with a fingerprint contains 50-60% of the total flavone based on hyperoside, wherein, the content of the hyperoside is 10-17%, the content of isoquercitrin is 10-16%, the contents of the isoquercitrin and kaempferol are respectively 25-35% and 3.5-4.5% after hydrolysis, the content of proanthocyanidin is 15-25%, and the extract has a definite fingerprint of the total flavone. The preparation method adopts low-polar or middle-polar macroporous absorbent resin to prepare a crude product of the extract from a concentrated solution of an extracting solution of the dogbane leaf extract, the content of the total flavone in the crude product is 40-44%, and the extract with the definite fingerprint is obtained by refining the crude product with the mixture of ethanol and ethyl acetate, and a corresponding analysis method, especially an assay method for the proanthocyanidin, is established. The extract meets the standard requirements of five oral bulk drugs, and the preparation method of the extract is convenient in operation and available in industrialization.
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Description

1. Technical field

[0001] The present invention relates to an active substance extracted from Chinese herbal medicine and an extraction method thereof, in particular to an extract mainly containing flavonoid active substances and a preparation method thereof. An extract with fingerprints and methods for its preparation and analysis. 2. Background technology

[0002] There are three kinds of Apocynum venetum leaf resources in my country: Apocynum venetum L. (Apocynum venetum L.) is also called kenaf, Poacynum hendersonni (Hook.f.) Wodson] and Apocynum venetum L. The plant Poacynum pictum (Schrenk) Baill, collectively referred to as Apocynum pictum (Schrenk) Baill, belongs to different genera of plants, and their flavonoid components are also different, and there is no comparison between them.

[0003] According to literature reports, Apocynum venetum L. contains flavonoids and their glycosides, triterpenes and sterols, lignans, coumarins, organic acids and esters, cyclic alco...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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