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Preparation method of folium ginkgo extract

A technology of ginkgo leaves and extracts, which is applied in the field of processing Chinese herbal medicines, can solve the problems of difficult industrial application of extraction methods, poor use of ginkgo leaves, loss of active components of ginkgo leaves, etc., achieving fewer steps, convenient adjustment, and easy temperature Effect

Inactive Publication Date: 2017-04-26
成都景睿生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The above-mentioned extraction method has a single technology, and it is easy to deal with the problem of local energy accumulation during the extraction process, resulting in a substantial loss of the active components of the extracted ginkgo leaves, and then the use of ginkgo leaves is not good.
Or, the problem of high energy consumption in the extraction process makes the extraction method difficult to achieve industrial application, and can only be reproduced in the laboratory environment, which is extremely restrictive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Ginkgo biloba extract preparation

[0032] Take fresh ginkgo leaves, wash them, dry them, break them until the area of ​​a single ginkgo leaf does not exceed 20 square millimeters, and transfer them to a brown jar; add an ethanol solution with a volume concentration of 60%, immerse the ginkgo leaves, and put Transfer to a water bath at 70-80°C, heat and extract in a water bath for 4 hours, stir occasionally to fully mix the ginkgo leaves and ethanol solution evenly, first filter out most of the ginkgo leaves with gauze, and then wash the gauze with 600ml of 30v% ethanol solution Ginkgo biloba residues above, the filtrate is fine filtered once with a 200-mesh sieve, and then suction filtered in a Buchner funnel with fine filter paper, using 3-5 pieces of filter paper to collect the filtrate and discard the filter residue; the filtrate is decompressed to recover ethanol, Then transfer to a concentration device for concentration to obtain a concentrated filtrate; vacuum-...

Embodiment 2

[0034] Ginkgo biloba extract preparation

[0035] Take fresh ginkgo leaves, wash them, dry them, break them until the area of ​​a single ginkgo leaf does not exceed 18 square millimeters, and transfer them to a brown jar; add ethanol solution with a volume concentration of 50%, immerse the ginkgo leaves, and put Transfer to a water bath at 75-80°C, heat and extract in a water bath for 5 hours, stir occasionally to fully mix the ginkgo leaves and the ethanol solution, first filter out most of the ginkgo leaves with gauze, and then wash the gauze with 500ml of 30v% ethanol solution Ginkgo biloba residues above, the filtrate is finely filtered once with a 200-mesh sieve, and then suction-filtered with a Buchner funnel with fine filter paper, using 4 pieces of filter paper to collect the filtrate and discard the filter residue; the filtrate is decompressed to recover ethanol, and then transfer Concentrate in a concentrating device to obtain a concentrated filtrate; vacuum-dry th...

Embodiment 3

[0037] Ginkgo biloba extract preparation

[0038] Take fresh ginkgo leaves, wash them, dry them, break them until the area of ​​a single ginkgo leaf does not exceed 18 square millimeters, and transfer them to a brown jar; add an ethanol solution with a volume concentration of 30%, which is about twice the raw material of ginkgo leaves weight, immerse the ginkgo leaves, transfer the jar to a water bath at 76-82°C, heat and extract in the water bath for 5 hours, and stir occasionally to mix the ginkgo leaves and ethanol solution thoroughly, and remove most of the ginkgo leaves by filtering with gauze. Then wash the ginkgo leaf residue on the gauze with 40v% ethanol solution of 550ml, and the filtrate is finely filtered once with a 200 mesh screen, and then suction-filtered with a Buchner funnel with fine filter paper, using 4 pieces of filter paper, collecting the filtrate and discarding the filter residue ; The filtrate is decompressed to recover ethanol, and then transferred...

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Abstract

The invention discloses a preparation method of folium ginkgo extract. The preparation method comprises following steps: (1), pretreatment: fresh folium ginkgo is taken, washed, air-dried or braked and smashed until the leaf area is not larger than 20 mm<2>; (2), extraction: a 40v%-90v% ethanol solution which is 1-5 times the weight of the folium ginkgo raw material prepared in the step (1) is added to the folium ginkgo raw material, a mixed solution is heated to 50-80 DEG C, kept at the temperature for 1-4 h and then filtered, filter residues are washed with a 10v%-99v% ethanol solution which is 0.5-1 time the weight of the filter residues, the washing solutions are combined, and a first ethanol extracting solution is obtained; (3), the first ethanol extracting solution is subjected to refined filtration with a 200-mesh screen and suction filtration, ethanol is recovered, the obtained solution is concentrated to dryness, and the folium ginkgo extract is obtained. According to the preparation method of the folium ginkgo extract, the ethanol solutions are adopted for mild extraction treatment, selectivity for medicinal composition in the folium ginkgo is good, and the extraction efficiency is high.

Description

technical field [0001] The invention relates to a processing method of Chinese medicinal materials, in particular to a preparation method of ginkgo leaf extract, which belongs to the processing and preparation method of traditional Chinese medicinal materials. Background technique [0002] Ginkgo biloba is one of the oldest gymnosperms left over from the Quaternary glacial movement, and it is known as a living fossil. [0003] Ginkgo biloba, also known as moth leaf and duck feet, is a plant of Ginkgo biloba Ginkgo biloba L. dry leaves. Harvest in autumn when leaves are still green and dry in time. Ginkgo leaves are often wrinkled or broken, and the whole ones are fan-shaped, 3-12cm long and 5-15cm wide. Yellow-green or light brown-yellow, the upper edge is irregularly curved, and some are concave in the middle, and the deep ones can reach 4 / 5 of the leaf length. [0004] Ginkgo biloba is light in body, faint in gas and slightly bitter in taste. GUIXIN, lung meridian. F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K36/16A61K127/00
CPCA61K36/16A61K2236/15A61K2236/17A61K2236/333A61K2236/39A61K2236/53
Inventor 胡燕
Owner 成都景睿生物科技有限公司
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