Method for extracting flavonoid from Sarcopyramis nepalensis Wall
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A technology of flavonoids and dry products, which is applied in the directions of pharmaceutical formulations, medical preparations containing active ingredients, plant/algae/fungus/moss components, etc., to achieve the effect of simple extraction steps and high purity
Inactive Publication Date: 2008-08-27
FUJIAN AGRI & FORESTRY UNIV
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[0003] So far, there is no report about the extraction of flavonoids from Chutouhong plants, and it is the first time that flavonoids have been isolated from Chutouhong plants at home and abroad.
Method used
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Examples
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Embodiment 1
[0016] 1. Take the dried part of the red plant and crush it
[0017] 2. After crushing, the dry product is cold immersed in 95% alcohol for 24 hours, heated and refluxed with 95% alcohol as a solvent for three times, and the filtrate is collected.
[0018] 3. The collected filtrate is concentrated into an extract in a vacuum rotary concentrator.
[0019] 4. Suspend with 1 times the volume of the extract, then extract with 2 times the amount of ethyl acetate of the suspension, extract 3 to 5 times, and combine the filtrate.
[0020] 5. Concentrate on the vacuum rotary concentrator to concentrate the extract into the extract.
[0021] 6. The extract is dissolved in ethyl acetate, and the dissolving solution is placed on a 200-300 mesh silica gel column, using petroleum ether / ethyl acetate as 5 / 1 as the eluent gradient, and collecting petroleum ether / ethyl acetate as 2 / 1 Part of the eluate was concentrated by rotating under vacuum.
[0022] 7. Dissolve in hot anhydrous alcohol and cr...
Embodiment 2
[0025] Taking the dried roots of the red plant roots as raw materials, the flavonoids were extracted according to the method of Example 1.
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Abstract
The invention relates to a method for extracting flavonoid from Sarcopyramis nepalensis Wall. The dry matter of the overground part of a Sarcopyramis nepalensis Wall plant is crushed and then is heated and refluxed for three times by using alcohol of 95 percent as solvent after being cold-dipped in the alcohol of 95 percent for 24 hours; filter liquor is collected to a vacuum rotation concentration instrument to be concentrated into extract. The extract is suspended by using the water which is one time the volume of the extract, and is extracted by using ethyl acetate which is twice the volume of the suspending liquid; the extraction is carried out for three to five times, extracting filter liquor is merged in the vacuum rotation concentration instrument to be concentrated into the extract. The extract is dissolved by using the ethyl acetate; the dissolved solution is led to a silica gel column with 200 to 300 screen meshes, and is eluted in a gradient way by using sherwood oil and the ethyl acetate; the proportion of the sherwood oil and the ethyl acetate is 5:1; the eluent, in which the proportion of the sherwood oil and the ethyl acetate is 2:1, is collected, concentrated in a vacuum rotation way, dissolved by hot absolute alcohol, crystallized by using cold acetone, and recrystallized by using methanol to obtain flavonoid matter crystal in the Sarcopyramis nepalensis Wall plant.
Description
Technical field [0001] The invention relates to an extraction method for extracting flavonoids from plants. technical background [0002] S. nepalensis Wall., belongs to Sarcopyramis Wall. in Melastomaceae, and is also known as "Sarcopyramis Wall." It is an annual herb, 10-20cm high, the stem is fleshy and hairless, with four edges, and the whole plant is purple-red. The leaf pair grows ovate or lanceolate, 3-6cm long, 1.0-2.5cm wide, apex is long and acuminate, edge is serrated, 3-5 main veins, long stalk, leaf surface is blue-green, leaf back is light green , Is white sparse bristles. The flowers are bisexual, light yellow or purple, with several clusters, branch tops or leaf axils; the calyx is inverted spire-shaped, shaped like a wind chest, hence the name. "The Dictionary of Chinese Medicine" records: its nature is cool, tastes sour, non-toxic; functions: clear lung heat, remove hepatitis; cure rheumatism arthralgia, tinnitus, deafness, and clear eyesight. "Practical Chinese...
Claims
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Application Information
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