Method of extracting and purifying sphenomeris chinensis orientin and vitexin
A technology of orientin and purification method, which is applied in chemical instruments and methods, organic chemistry, medical raw materials derived from ferns/filamentous plants, etc., and can solve problems such as numerous operation steps, high price, and high toxicity
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[0023] (1) Soak the aerial part of S. chinensis with 70% ethanol for 2 times, and the volume of ethanol added is 15 times of the weight of the medicinal material, and each time of leaching for 7 days. The extract was filtered and concentrated, and the ethanol was evaporated to obtain a crude extract.
[0024] (2) The crude extract was sequentially extracted 4 times with petroleum ether, 3 times with ethyl acetate, and 5 times with n-butanol, and the n-butanol extract was concentrated under reduced pressure at 60°C to obtain the n-butanol fraction.
[0025] (3) The concentrated n-butanol part is placed in a refrigerator at 4°C for 10 days, and yellow granular precipitates precipitate out. The precipitates are slightly soluble in solvents such as water, ethanol, ethyl acetate, and chloroform, and are difficult to separate and purify by recrystallization. .
[0026] (4) Prepare the precipitate into an aqueous suspension, add 1% NaOH dropwise until the solution is clear, add 50 t...
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