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Method for extracting holy thistle total flavonoids from holy thistle stalks

A technology for extracting water from milk thistle is applied in the field of extraction of total flavonoids from milk thistle, which can solve the problem that the comprehensive utilization value needs to be further developed, and achieve the effects of increasing comprehensive utilization efficiency, broadening sources and increasing farmers' income.

Inactive Publication Date: 2011-10-26
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a medicinal economic crop, the planting area of ​​milk thistle is increasing year by year in my country. At present, its straw is mainly used as feed or fuel, and its comprehensive utilization value needs to be further developed.

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0012] Specific Embodiment 1: This embodiment is a method for extracting total flavonoids of milk thistle from milk thistle stalks, which is realized through the following steps: 1. Grinding the dried milk thistle stalks to obtain crushed milk thistle stalks , then add the crushed milk thistle stalks into the extraction tank, then add industrial ethanol into the extraction tank, soak for 90-120 minutes, then heat to 70-80°C, heat-preserve and counter-current extract for 2-2.5 hours, and then filter to remove impurities to obtain Extract solution, wherein the ratio of the crushed body mass of milk thistle stalk to the volume of industrial ethanol is 1g: 6-10mL;

[0013] 2. Pour the extract into a concentration tank, heat to 80-85°C, keep warm until the volume content of ethanol in the extract is lower than 20%, and then filter to obtain the alcohol precipitate;

[0014] 3. Wash the alcohol precipitate with 10% to 20% ethanol for 2 to 3 times by volume fraction, then dissolve th...

specific Embodiment approach 2

[0018] Embodiment 2: This embodiment is different from Embodiment 1 in that it is soaked for 100 minutes in step 1. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0019] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that it is heated to 75° C. in step 1. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for extracting holy thistle total flavonoids from holy thistle stalks and relates to an extraction method of holy thistle total flavonoids, which achieves the comprehensive utilization of holy thistle stalks, increases the comprehensive utilization efficiency of holy thistle resources, reduces the investment recovery period and increases the supply of holy thistle total flavonoids. The pulverized holy thistle stalks are extracted with ethanol to get an extraction liquid, then the extraction liquid is concentrated and precipitated with alcohols, and the alcohol precipitates are washed and dissolved in ethanol, followed by decolorization and concentration. The invention achieves the purpose of holy thistle stalk reuse as a cyclic economy project, so as to stimulate the development of holy thistle farming, increase the added value of holy thistle stalks, increase the incomes of farmers and brings obvious economic and social benefits. The weight percentage concentration of the holy thistle total flavonoids disclosed by the invention, is 60% to 70%, and the yield is 0.1% to 0.2% of holy thistle stalks.

Description

technical field [0001] The invention relates to a method for extracting total flavonoids of milk thistle. Background technique [0002] Milk thistle is an herb of Compositae, native to the Mediterranean region. It was introduced to my country from Germany in the 1980s, and was introduced and cultivated in Jiangsu, Shaanxi, and Northeast China. The total flavonoids of milk thistle are a kind of flavonoid lignans extracted from the seeds of milk thistle, which have the pharmacological activity of preventing and treating liver diseases, and are widely used clinically. Most of the development and utilization of milk thistle at home and abroad is to extract the total flavonoids of milk thistle from the fruit, and make various preparations after further purification and chemical modification. So far, there has been no report of extracting total flavonoids of milk thistle from milk thistle stalk. As a medicinal economic crop, the planting area of ​​milk thistle in our country is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K36/28A61P1/16A61K135/00
Inventor 张彦龙赵洪柱曾伟民赵丹丹雷虹刘振东邱佳
Owner HEILONGJIANG UNIV
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