Medicine composition of gingko leaf and rhodiola root
A composition, technology of Rhodiola rosea, used in the field of medicine
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Embodiment 1
[0219] Example 1 Preparation and content determination of Ginkgo biloba extract
[0220] Preparation of Ginkgo biloba extract
[0221] Take 5 kg of ginkgo leaves, crush them, add 75% ethanol to reflux and extract twice, add 10 times the amount of alcohol for the first time, extract for 3 hours, add 8 times the amount of alcohol for the second time, extract for 2 hours, combine the filtrates, and concentrate the filtrates to contain alcohol About 5%, add the same amount of water, stir well, refrigerate at 4°C for 24 hours, centrifuge, take the supernatant and put it on the column, wash it with 3 times the volume of water, 15% ethanol, and 75% ethanol, collect the 75% ethanol solution, Concentrate under reduced pressure to 1 / 3 of the volume of the medicinal material, let stand, filter, concentrate the filtrate under reduced pressure, dry in vacuum, and pulverize to obtain.
[0222] Three batches of Ginkgo biloba extract were prepared respectively, and the yields are shown in Ta...
Embodiment 2
[0237] Example 2 Preparation and Content Determination of Ginkgo Leaf Total Flavonoids
[0238] Preparation of total flavonoids from Ginkgo biloba leaves
[0239] Take 1kg of ginkgo leaves, chop them, add 70% ethanol and warm soak at 80°C for two times, each time for 2 hours, filter, recover the ethanol from the filtrate until it has no alcohol smell, add appropriate amount of water to obtain a suspension equivalent to 1g of the original medicinal material per 1ml , refrigerated for 12 hours, centrifuged, took the supernatant, added to the treated polyamide column (100g, 30-60 mesh, ethanol wet packing, first washed the column with 2 times the column volume of ethanol, and then washed it with water (nearly alcohol smell, spare), first wash with 3 times column volume of water, then wash with 2 times column volume of 10% ethanol, discard the eluent, and wash with 4 times column volume of 80% ethanol eluate, collect eluent, recover ethanol, concentrate under reduced pressure to ...
Embodiment 3
[0249] Embodiment 3 preparation and content determination of ginkgolide
[0250] Preparation of Ginkgolide
[0251] Take 1kg of ginkgo leaves, chop them, add 70% ethanol and warm soak at 80°C for two times, each time for 2 hours, filter, recover the ethanol from the filtrate until it has no alcohol smell, add appropriate amount of water to obtain a suspension equivalent to 1g of the original medicinal material per 1ml . Add 1 / 2 amount of petroleum ether to shake and extract 4 times, discard the petroleum ether extract; then use 1 / 2 amount of ethyl acetate to shake and extract 4 times, combine the ethyl acetate solution, recover the solvent under reduced pressure, and evaporate to dryness , add 30% ethanol to the residue and heat to dissolve, leave to crystallize, crystallize and recrystallize once with 30% ethanol to obtain the product.
[0252] Three batches of ginkgolides were prepared respectively, and the yields are shown in Table 2-3.
[0253] Content Determination of ...
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