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Ginkgo biloba leaf extract preparation method

A technique for ginkgo biloba leaves and extracts, which is applied in the field of preparation of ginkgo biloba extracts, can solve the problems of long production cycle, low extraction rate, difficult operation and the like, saves organic or inorganic solvents, reduces costs and environmental pollution, and simplifies experiments effect of steps

Inactive Publication Date: 2015-08-26
天益京(天津)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

[0005] 2. Steam distillation method: This method has the advantages of simple equipment, low cost, and meets environmental protection requirements, but the extraction efficiency of water extraction method in the prior art is low, the content of impurities is high, and the post-treatment process is difficult, so it is rarely used
These technologies have the characteristics of high recovery rate, green environmental protection and no pollution, but due to cost, technical and other reasons, they are still in the experimental stage and not mature enough
[0007] In the traditional extraction method, the solvent enters the cells easily or faster under heating conditions, but the solubility of soluble substances is higher under hot conditions, and they are dissolved successively, resulting in high osmotic pressure, resulting in low extraction rate and low active ingredients. Moreover, the process is cumbersome and the production cycle is long
[0008] The new extraction method is still in the experimental stage, the cost is high, and the operation is difficult. The above-mentioned method is not suitable for industrialized large-scale production at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of preparation method of ginkgo leaf extract, take fresh ginkgo leaf as raw material, and its preparation method comprises:

[0032] Ginkgo biloba pretreatment: take fresh ginkgo biloba leaves, wash and dry them, bake them in an oven at 70°C for 8 hours, take them out and place them in a drying oven to cool them, crush the dried ginkgo leaves to 60 mesh, and put the ginkgo biloba powder in a brown jar ready for use;

[0033] Extraction: the ethanol solution with a volume concentration of 60% is prepared with 640ml of 95% ethanol and 360ml of pure water. Take 100g of ginkgo leaf powder and place it in 700ml of ethanol solution with a volume concentration of 60%, place it in a water bath at 60°C for 2 hours, stir once every 10 minutes, filter it with gauze, add 700ml of ethanol solution to the filter residue, place in Extract in a water bath at 60°C for 2 hours, stir once every 10 minutes, after the extraction is completed, filter with gauze, combine the extracts,...

Embodiment 2

[0038] A kind of preparation method of ginkgo leaf extract, take fresh ginkgo leaf as raw material, and its preparation method comprises:

[0039] Ginkgo biloba pretreatment: take fresh ginkgo biloba leaves, wash and dry them, bake them in an oven at 70°C for 10 hours, take them out and place them in a drying oven to cool them, crush the dried ginkgo leaves to 60 mesh, and place the ginkgo biloba powder in a brown jar ready for use;

[0040] Extraction: the ethanol solution with a volume concentration of 60% is prepared with 640ml of 95% ethanol and 360ml of pure water. Get 200g of ginkgo leaf powder and place it in 1400ml of ethanol solution with a volume concentration of 60%, place it in a water bath at 65°C for 2 hours, stir once every 10 minutes, filter it with gauze, add 1400ml of ethanol solution to the filter residue, place in Extract in a water bath at 65°C for 2 hours, stir once every 10 minutes, after the extraction is completed, filter with gauze, combine the extra...

Embodiment 3

[0045] A kind of preparation method of ginkgo leaf extract, take fresh ginkgo leaf as raw material, and its preparation method comprises:

[0046] Ginkgo biloba pretreatment: take fresh ginkgo biloba leaves, wash and dry them, bake them in an oven at 70°C for 12 hours, take them out and place them in a drying oven to cool them, crush the dried ginkgo leaves to 60 mesh, and place the ginkgo biloba powder in a brown jar ready for use;

[0047] Extraction: the ethanol solution with a volume concentration of 60% is prepared with 640ml of 95% ethanol and 360ml of pure water. Get 300g of ginkgo leaf powder and place it in 2100ml of ethanol solution with a volume concentration of 60%, place it in a water bath at 70°C for 2 hours, stir once every 10 minutes, filter it with gauze, add 2100ml of ethanol solution to the filter residue, place in Extract in a water bath at 70°C for 2 hours, stir once every 10 minutes, after the extraction is completed, filter with gauze, combine the extra...

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Abstract

This invention provides a ginkgo biloba leaf extract preparation method, and belongs to the technical field of extraction and separation of natural plant effective ingredients. The preparation method is based on fresh ginkgo biloba leaf as a raw material, and includes the following steps: (1) the pretreatment of ginkgo biloba leaf into ginkgo biloba leaf powder; (2) extraction and filtering of the ginkgo biloba leaf powder to obtian a leaching solution; (3) coarse filtration and suction filtration of the leaching solution to obtain filtrate; (4) distillation and concentration of the filtrate; and (5) vacuum drying and purification of the concentrated filtrate to obtain a ginkgo biloba extract; the ginkgo biloba extract contains flavonoids and lactone. The preparation method simplifies the production process, and is less in steps, simple in operation, free of use of a lot of organic solvent, high in recovery rate, and non-pollution.

Description

technical field [0001] The invention relates to the technical field of extraction and separation of active ingredients of natural plants, in particular to a preparation method of ginkgo leaf extract. Background technique [0002] Ginkgo is a deciduous tree belonging to the family Ginkgoceae and the genus Ginkgo. Ginkgo biloba appeared hundreds of millions of years ago. It is the oldest relict plant among the gymnosperms left over from the Quaternary glacial movement. The surviving Ginkgo biloba is rare and scattered, and there are few hundred-year-old trees. All other plants of the Ginkgo class are extinct, so Ginkgo is also known as a living fossil. Ginkgo biloba extract contains a large amount of ginkgo flavonoids and ginkgolides, which can increase cerebral blood flow, improve cerebral vascular circulation, protect brain cells, expand coronary arteries, prevent angina pectoris and myocardial infarction, prevent thrombosis, and improve the body's immunity ability. It is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K36/16A61K127/00
Inventor 欧阳玉岭
Owner 天益京(天津)生物科技有限公司
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