Extracting method of tea polyphenol
An extraction method and technology of tea polyphenols, applied in the field of extraction of tea polyphenols, can solve the problems of long extraction time, large solvent consumption, and low purity, and achieve the effects of easy industrial production, improved extraction efficiency, and avoiding metal ions
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Embodiment 1
[0045] A method for extracting tea polyphenols, comprising the following steps:
[0046] (1) Soaking: use water to soak the tea powder, the amount of water added is 20 times the weight of the tea powder, and the soaking time is 45 minutes;
[0047] (2) Extraction: put the above-mentioned materials into a flash extractor for extraction, the extraction voltage is 100V, and the extraction time is 60s to obtain a crude extract;
[0048] (3) Centrifugation: centrifuge the above-mentioned crude extract for 5 minutes with a high-speed centrifuge at a speed of 3000 r / min to obtain 1035 ml of centrifugate;
[0049] (4) Precipitation and suction filtration: add a precipitating agent to the centrifugate for precipitation, and use NaHCO 3 Adjust the pH value to 5.5, and filter with suction to obtain a precipitate;
[0050] (5) transfer to dissolve: add 4% tartaric acid to carry out transfer to dissolve in the deposit, obtain transfer to dissolve;
[0051] (6) Extraction: Send the trans...
Embodiment 2
[0057] A method for extracting tea polyphenols, comprising the following steps:
[0058] (1) Soaking: use water to soak the tea powder, the amount of water added is 30 times the weight of the tea powder, and the soaking time is 75 minutes;
[0059] (2) Extraction: put the above-mentioned materials into a flash extractor for extraction, the extraction voltage is 100V, and the extraction time is 120s to obtain a crude extract;
[0060] (3) Centrifugation: centrifuge the above-mentioned crude extract for 15min with a high-speed centrifuge, and the rotating speed is 4000r / min to obtain 1025ml of centrifugate;
[0061] (4) Precipitation and suction filtration: add a precipitating agent to the centrifugate for precipitation, and use NaHCO 3 Adjust the pH value to 6.5, and filter with suction to obtain a precipitate;
[0062] (5) transfer to dissolve: add 6% tartaric acid to carry out transfer to dissolve in the precipitate, obtain transfer to dissolve;
[0063] (6) Extraction: Se...
Embodiment 3
[0069] A method for extracting tea polyphenols, comprising the following steps:
[0070] (1) Soaking: use water to soak the tea powder, the amount of water added is 20 times the weight of the tea powder, and the soaking time is 60 minutes;
[0071] (2) Extraction: put the above-mentioned materials into a flash extractor for extraction, the extraction voltage is 100V, and the extraction time is 90s to obtain a crude extract;
[0072] (3) Centrifugation: Centrifuge the above-mentioned crude extract for 15 minutes with a high-speed centrifuge at a speed of 3500 r / min to obtain 1010.5 ml of centrifugate;
[0073] (4) Precipitation and suction filtration: add a precipitating agent to the centrifugate for precipitation, and use NaHCO 3 Adjust the pH value to 6, and filter with suction to obtain a precipitate;
[0074] (5) transfer to dissolve: add 5% tartaric acid to carry out transfer to dissolve in the precipitate, obtain transfer to dissolve;
[0075] (6) Extraction: Send the ...
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