Persimmon leaf flavone extract and preparation method thereof
A technology for persimmon leaf flavonoids and extracts, which is applied to the field of persimmon leaf flavonoids extract and its preparation, can solve the problems of thick extract, poor water solubility of the extract, time-consuming drying and the like, and achieves high flavonoid content and reduced safety. Risk and environmental cost, time-consuming reduction effect
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Embodiment 1
[0034] The preparation method of embodiment 1 persimmon leaf flavone extract
[0035] The preparation method of the persimmon leaf flavonoids extract of the present embodiment comprises the following steps:
[0036] (1) Take 4 kg of dried persimmon leaves and cut them into pieces, put them into a non-woven bag, add 40 kg of water, adjust the pH to 7.5 with sodium hydroxide, soak overnight (room temperature, more than 8 hours);
[0037] (2), decoct the soaking solution for 2 hours, filter for later use;
[0038] (3) Add 40kg of water to the persimmon leaves, adjust the pH to 7.5 with sodium hydroxide, decoct for 1 hour again, and filter;
[0039] (4), merge twice filtrate, under 60 ℃ vacuum (-0.1Mpa) concentrate filtrate to relative density 1.12~1.15 (60 ℃, utilize the density meter to measure the relative density of concentrated solution), get initial concentrated solution (the primary concentrated solution Store at 4°C for later use), with a total weight of about 150g;
[...
Embodiment 2
[0048] The preparation method of embodiment 2 persimmon leaf flavone extract
[0049] The preparation method of the persimmon leaf flavonoids extract of the present embodiment comprises the following steps:
[0050] (1) Take 2 kg of dried persimmon leaves and cut them into pieces, put them into a non-woven bag, add 24 kg of water, adjust the pH to 7.8 with sodium hydroxide, soak overnight (room temperature, more than 8 hours);
[0051] (2), decoct the soaking solution for 2 hours, filter for later use;
[0052] (3) Add 24kg of water to the persimmon leaves, adjust the pH to 7.8 with sodium hydroxide, decoct for 1 hour again, and filter;
[0053] (4), merge twice filtrate, under 60 ℃ vacuum (-0.1Mpa) concentrate filtrate to relative density 1.12~1.15 (60 ℃, utilize the density meter to measure the relative density of concentrated solution), get initial concentrated solution (the primary concentrated solution Store at 4°C for later use), weighing about 75g;
[0054] (5), take...
Embodiment 3
[0060] The preparation method of embodiment 3 persimmon leaf flavone extract
[0061] The preparation method of the persimmon leaf flavonoids extract of the present embodiment comprises the following steps:
[0062] (1) Take 2 kg of dried persimmon leaves, cut them into pieces, put them into a non-woven bag, add 16 kg of water, adjust the pH to 8.0 with sodium hydroxide, soak overnight (room temperature, more than 8 hours);
[0063] (2), decoct the soaking solution for 3 hours, filter for later use;
[0064] (3), add 16kg of water to the persimmon leaves, adjust the pH to 8.0 with sodium hydroxide, decoct for 2 hours again, and filter;
[0065] (4), combine the two filtrates, concentrate the filtrate to a relative density of 1.12 to 1.15 (at 60°C, use a density meter to measure the relative density of the concentrate), and obtain the primary concentrate (preserve the primary concentrate at 4°C for future use), weighing about 75g ;
[0066] (5), take the initial concentrate ...
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