Usage of rhizoma bletillae ethyl acetate extractive
A technology of ethyl acetate extraction and ethyl acetate, which is applied in the direction of medical preparations containing active ingredients, plant raw materials, and resistance to vector-borne diseases, etc., to achieve good inhibitory effect and protect individuals from bacterial infection
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Embodiment 1
[0019] The preparation method of embodiment 1 white and ethyl acetate extract
[0020] Weigh 250g of Baiji medicinal material, pulverize, add 95% v / v ethanol to heat and reflux to extract twice, the first time is 10 times the amount, the second time is 8 times the amount, each time for 1 hour. The two extracts were combined, filtered, and the solvent was recovered from the filtrate under reduced pressure to obtain 31 g of crude extract. Take the crude extract, add about 250ml of water, ultrasonically suspend, transfer to a 1000ml separatory funnel, add petroleum ether to extract 8 times, 300ml each time, and extract the remaining water layer with ethyl acetate 10 times, 250ml each time, reduce Ethyl acetate was recovered under pressure to obtain 8 g of ethyl acetate extract.
Embodiment 2
[0021] The preparation method of embodiment 2 white and ethyl acetate extract
[0022] Weigh 500g of Baiji medicinal material, pulverize it, add 80% v / v ethanol to heat and reflux to extract twice, the first time is 10 times the amount, the second time is 8 times the amount, each time for 1 hour. The two extracts were combined, filtered, and the solvent was recovered from the filtrate under reduced pressure to obtain a crude extract. Take the crude extract, after drying, add petroleum ether and shake and extract for 5 times, then shake and extract the remaining water layer with ethyl acetate for 5 times, combine the parts of ethyl acetate, recover ethyl acetate under reduced pressure, and obtain ethyl acetate for extraction things.
Embodiment 3
[0023] The preparation method of embodiment 3 white and ethyl acetate extract
[0024] Weigh 100g of Baiji medicinal material, pulverize it, add 90% v / v ethanol to heat and reflux to extract twice, the first time is 12 times the amount, the second time is 10 times the amount, each time for 1 hour. The two extracts were combined, filtered, and the solvent was recovered from the filtrate under reduced pressure to obtain a crude extract. Take the crude extract, dry it, add petroleum ether and soak it warmly for 3 times, and soak the remaining water layer with ethyl acetate for 5 times, combine the ethyl acetate parts, recover the ethyl acetate under reduced pressure, and obtain the ethyl acetate extract.
[0025] The beneficial effects of the present invention are illustrated below through test examples.
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