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Method for extracting and preparing medlar leaf flavone

A technology of wolfberry leaf flavonoids and wolfberry leaves, which is applied in the field of extraction and preparation of flavonoids, can solve the problems of narrow application range, high requirements for instruments and equipment, and high operating costs, and achieve the effects of simplification of process, reduction of equipment investment, and shortening of extraction time

Active Publication Date: 2012-05-30
CHINA ACAD OF SCI NORTHWEST HIGHLAND BIOLOGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high requirements for instruments and equipment, high operating costs, and narrow application range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 A method for extracting and preparing flavonoids from wolfberry leaves, comprising the following steps:

[0032] (1) Lycium barbarum leaves were manually picked to remove impurities, and then dried in the shade indoors to obtain dry samples of wolfberry leaves.

[0033] (2) Put 5 kg of dried wolfberry leaves into a pulverizer for crushing, and pass through a 20-mesh sieve after crushing to obtain wolfberry powder.

[0034] (3) Lycium barbarum powder and ethanol with a mass concentration of 80% were extracted for 10 hours at a volume ratio of 1:5 to obtain an extract.

[0035] (4) After the extraction solution was ground once by a colloid mill with a rotor speed of 20000 r / min, a colloidal Lycium barbarum leaf extraction solution was obtained.

[0036] (5) Put the colloidal wolfberry leaf extraction solution into a high-pressure homogenizer, homogenize under a pressure of 10Mpa, and form a uniform wolfberry leaf extraction solution after 10min; Centrifuge the...

Embodiment 2

[0041] Embodiment 2 A method for extracting and preparing flavonoids from wolfberry leaves, comprising the following steps:

[0042] (1) Lycium barbarum leaves were manually picked to remove impurities, and then dried in the shade indoors to obtain dry samples of wolfberry leaves.

[0043] (2) Put 50 kg of dried wolfberry leaves into a pulverizer for crushing, pass through a 200-mesh sieve after crushing, and obtain wolfberry powder.

[0044] (3) Lycium barbarum powder and ethanol with a mass concentration of 45% were leached for 240 hours at a solid-liquid volume ratio of 1:100 to obtain an extract.

[0045] (4) After the extraction solution was ground 10 times by a colloid mill with a rotor speed of 10000 r / min, a colloidal wolfberry leaf extraction solution was obtained.

[0046](5) Put the colloidal wolfberry leaf extraction solution into a high-pressure homogenizer, homogenize under a pressure of 5Mpa, and form a uniform wolfberry leaf extraction solution after 300min; ...

Embodiment 3

[0051] Embodiment 3 A method for extracting and preparing flavonoids from wolfberry leaves, comprising the following steps:

[0052] (1) Lycium barbarum leaves were manually picked to remove impurities, and then dried in the shade indoors to obtain dry samples of wolfberry leaves.

[0053] (2) Put 20 kg of dried wolfberry leaves into a pulverizer for crushing, and pass through a 100-mesh sieve after crushing to obtain wolfberry powder.

[0054] (3) Lycium barbarum powder and ethanol with a mass concentration of 95% were leached for 24 hours at a solid-liquid volume ratio of 1:10 to obtain an extract.

[0055] (4) After the extract solution was ground 5 times by a colloid mill with a rotor speed of 8000 r / min, a colloidal Lycium barbarum leaf extract solution was obtained.

[0056] (5) Put the colloidal wolfberry leaf extraction solution into a high-pressure homogenizer, homogenize under a pressure of 42Mpa, and form a uniform wolfberry leaf extraction solution after 150min; ...

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PUM

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Abstract

The invention relates to a method for extracting and preparing medlar leaf flavone. The method comprises the following steps of: (1) after picking and removing impurities manually, drying medlar leaves indoor to obtain a medlar leaf dry sample; (2) crushing the medlar leaf dry sample and screening the crushed medlar leaf dry sample to obtain medlar powder; (3) leaching the medlar powder by using ethanol to obtain leaching liquor; (4) grinding the leaching liquor by using a colloid grinder to obtain colloidal medlar leaf leaching solution; (5) homogenizing and separating the colloidal medlar leaf leaching solution to obtain liquid supernatant and filter residue; (6) removing impurities from the liquid supernatant by using a ceramic membrane to obtain filtrate; (7) adsorbing the filtrate byusing weak-polarity macroporous adsorption resin and eluting the filtrate by using ethanol solution to obtain medlar leaf flavone-containing eluent; and (8) after concentrating and drying the medlar leaf flavone-containing eluent under a reduced pressure in a vacuum, obtaining the medlar leaf flavone powder. The method has low cost and high extraction rate; and the obtained medlar leaf flavone has stable properties, high content, and high biological activity of heart head blood-vessel disease resistance, cancer resistance, oxidation resistance and the like.

Description

technical field [0001] The invention relates to a method for extracting and preparing flavonoids, in particular to a method for extracting and preparing flavonoids from wolfberry leaves. Background technique [0002] Lycium barbarum leaves are the leaves of Lycium barbarum L., a plant of the genus Lycium Linn. in the Solanaceae family. Commonly known as Tianjingcao, it is light green and non-toxic. Essence, clearing away heat and quenching thirst, nourishing the liver and improving eyesight. Modern scientific research has proved that wolfberry leaves have anti-aging, anti-inflammatory, cardiovascular and cerebrovascular protection, antibacterial and antiviral effects. It is also a nourishing and strengthening agent with high medicinal and edible value. food and cosmetic industries. [0003] Lycium barbarum leaf flavonoids are a class of natural flavonoids, which are rich in flavonoids, flavonols, flavonol glycosides, flavanols and other anti-cardiovascular and cerebrovascu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D311/28A61K36/815A23L1/29A61P9/14A61P35/00A61P39/06A61P9/00A61K127/00A23L33/00
Inventor 陶燕铎邵赟刘增根于瑞涛陈晨梅丽娟王启兰
Owner CHINA ACAD OF SCI NORTHWEST HIGHLAND BIOLOGY INST
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