Method for extracting high-purity lotus leaf flavones
A lotus leaf flavonoid and high-purity technology is applied in the field of extracting high-purity lotus leaf flavonoids, and can solve the problems of high impurity content of lotus leaf flavonoids, limited application of lotus leaf flavonoids, low content of lotus leaf flavonoids, etc. The effect of low production cost and increased added value
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Embodiment 1
[0020] Grind the dried lotus leaves, add 1 part by weight of dried lotus leaves and 15 parts by weight of ethanol with a mass concentration of 50% in the extraction tank, extract 3 times at 50°C for 1.5 hours each time, combine the extracts, and extract the extracts After ultrafiltration with a 10,000 molecular weight ultrafiltration membrane, the concentrated solution passing through the 10,000 molecular weight ultrafiltration membrane is obtained, and pure water is added to the concentrated solution for dilution. The mass ratio of pure water to the concentrated solution is 99:1, and the diluted solution is filtered. XDA-6 macroporous adsorption resin column, the lotus leaf flavonoids are adsorbed on the macroporous adsorption resin column, and the lotus leaf flavonoids adsorbed on the macroporous adsorption resin column are eluted with ethanol with a mass concentration of 70%, and the eluent is passed through The 100-molecular-weight membrane is concentrated to obtain a conce...
Embodiment 2
[0022] Grind the dried lotus leaves, add 1 part by weight of dried lotus leaves and 25 parts by weight of a mass concentration of 30% to the extraction tank, extract twice at 80°C for 2 hours each time, combine the extracts, and pass the extracts through ten 10,000 molecular weight ultrafiltration membrane ultrafiltration to obtain a concentrated solution that passes through a 100,000 molecular weight ultrafiltration membrane, add pure water to the concentrated solution to dilute, the mass ratio of pure water to the concentrated solution is 100:1, pass the diluted solution through XDA- 6 macroporous adsorption resin columns, the lotus leaf flavonoids are adsorbed on the macroporous adsorption resin column, the lotus leaf flavonoids adsorbed on the macroporous adsorption resin column are eluted with ethanol with a mass concentration of 70%, and the eluate is passed through a 100 molecular weight The membrane is concentrated to obtain the concentrated solution intercepted by the ...
Embodiment 3
[0024] Grind the dried lotus leaves, add 1 weight part of dried lotus leaves and 8 weight parts of ethanol with a mass concentration of 70% to the extraction tank, extract 4 times at 30 ° C, extract 1 hour each time, combine the extracts, and extract the extracts After ultrafiltration with a 10,000 molecular weight ultrafiltration membrane, the concentrated solution passing through the 10,000 molecular weight ultrafiltration membrane is obtained, and pure water is added to the concentrated solution for dilution. The mass ratio of pure water to the concentrated solution is 100:1, and the diluted solution is filtered. XDA-6 macroporous adsorption resin column, the lotus leaf flavonoids are adsorbed on the macroporous adsorption resin column, and the lotus leaf flavonoids adsorbed on the macroporous adsorption resin column are eluted with ethanol with a mass concentration of 70%, and the eluent is passed through The 100-molecular-weight membrane is concentrated to obtain a concent...
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