Method for extracting and purifying flavonoids of artemisia argyi

Abstract

The invention relates to plant extracting technology, in particular to a method for extracting and purifying flavonoids of artemisia argyi. The method comprises the following main steps of: adding artemisia argyi raw powder into 60-90 of mixing liquid of petroleum ether and ethyl acetate in proportion of 8:2 at the temperature of 40-59DEG C; degreasing and decoloring by using a percolation method to obtain degreased artemisia argyi powder; adding ethanol of 70 percent into the degreased artemisia argyi powder at the temperature of 60-80DEG C; concentrating the volume of an extracting solution 2 obtained by the percolation method into one fifth of the original volume; regulating a pH value by adding acid until generating deposits; centrifugating to obtain a flavonoids crude product of artemisia argyi; after dissolving the flavonoids crude product of artemisia argyi by using ethanol of 70 percent, adding trichloroacetic acid of 5 percent; and obtaining a flavonoids competitive product of artemisia argyi after filtering, adding acid and centrifugating. The method has simple technology, strong maneuverability and simple required device, can be used for additionally producing moxa punk, moxa essential oil, artemisia argyi polyhexose, and the like, and increases overall economic benefit.

Description

【Technical field】 [0001] The invention relates to a plant extraction process, in particular to a method for extracting and purifying mugwort flavonoids. 【Background technique】 [0002] Artemisia mugwort is a perennial herb of the genus Artemisia in the Asteraceae family. The whole plant has an aromatic smell, and the aroma is stronger when rubbed. Distributed in Northeast, North, East and Southwest provinces. In Qinghai Province, it is mainly distributed in Xining and eastern counties, where it grows on forest margins, hillsides, wastelands, and fields. Artemisia mugwort mainly contains chemical components such as volatile oil, flavonoids, eucalyptols, and triterpenoids. Every 100g of tender stems and leaves contains 5.14mg of carotene, 1.07mg of vitamins, and 52mg of vitamin C. The air-dried leaves contain 25.85% of protein and 25.8% of fat. 2.59%, minerals 10.13% and vitamins and other ingredients, every 100g dry product contains 38.4mg of potassium, 9.9mg of calcium, 2....

AI Technical Summary

Problems solved by technology

[0007] Research has found that mugwort is rich in fats and oils, and there are many types of them, while flavonoids are mostly in lipid packages. That is to say, if you want to extract flavonoids, you must remove the oils and fats as much as possible, which brings a lot of inconvenience to industrial production.

From the above prior art documents, there is no requirement for degreasing, and the incomplete degreasing will directly affect the yield; in addition, the chlorophyll in Artemisia mugwort can affect the extraction of flavonoids. For how to remove chlorophyll, the above-mentioned documents also did not mention

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