A kind of preparation technology of water-soluble ginkgo leaf extract
A preparation process, the technology of ginkgo biloba, which is applied in the field of preparation of water-soluble ginkgo leaf extract, can solve the problems of large difference in resin adsorption, poor process controllability, limited product application, etc., and achieve stable product quality and simple production process , Good process stability
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Embodiment 1
[0036] Take 5kg of crushed ginkgo leaves, add 35kg of 60% acetone-water mixed solution, reflux extraction twice, combine the two extracts, concentrate until no acetone; add water to dilute to a density of 1.04g / mL (50°C), let cool, cool Settle (0-10°C) for 8 hours, filter to obtain a clarified filtrate; apply HPD750 macroporous adsorption resin to the filtrate, pre-wash 2BV with purified water, pre-wash 2BV with 10% ethanol, then elute with 65% ethanol for 2BV, and elute with ethanol Liquid, concentrated to get alcohol-free thick paste I; take non-alcoholic thick paste I, add about 8 times the amount of 95% ethanol to dissolve, the alcohol degree is about 81%, let it cool, filter, and concentrate the filtrate to get alcohol-free thick paste II; Thick paste II, add 15 times the amount of purified water, heat and extract for 0.5h, cool to room temperature, refrigerate (0-10°C) for 24h, cool the liquid, filter, concentrate, and dry under reduced pressure to obtain water-soluble gi...
Embodiment 2
[0039] Take 5 kg of crushed Ginkgo biloba leaves, add 35 kg of 60% acetone-water mixed solution, reflux extraction twice, combine the two extracts, concentrate until there is no acetone; add water to dilute to a density of 1.05 g / mL, let cool, and freeze 10°C) for 10 hours, filtered to obtain a clarified filtrate; HPD750 macroporous adsorption resin was applied to the filtrate, pre-washed with purified water for 2BV, 15% ethanol for 2BV, and then eluted with 65% ethanol for 2BV, and the ethanol eluate was taken and concentrated to obtain Alcohol-free thick paste I; take non-alcoholic thick paste I, add about 10 times the amount of 95% ethanol to dissolve, the alcohol content is about 85%, let it cool, filter, concentrate the filtrate, and get non-alcoholic thick paste II; take non-alcoholic thick paste II , adding 15 times the amount of purified water, heating and extracting for 1.0h, cooling to room temperature, refrigerating (0-10°C) for 30h, cooling the liquid, filtering, co...
Embodiment 3
[0042] Take 50 kg of crushed Ginkgo biloba leaves, add 300 kg of 60% acetone-water mixed solution, reflux extraction twice, combine the two extracts, concentrate to no acetone; 10°C) for 8 hours, filtered to obtain a clarified filtrate; the filtrate was applied to HPD750 macroporous adsorption resin, pre-washed with purified water for 2BV, 10% ethanol for 2BV, and then eluted with 65% ethanol for 2BV, and the ethanol eluate was taken and concentrated to obtain Alcohol-free paste I; take alcohol-free paste I, add about 8 amounts of 95% ethanol to dissolve, the alcohol content is about 82%, let it cool, filter, and concentrate the filtrate to obtain alcohol-free paste II; take alcohol-free paste II, Add 10 times the amount of purified water, heat and extract for 0.5h, cool to room temperature, refrigerate (0-10°C) for 24h, cool the solution, filter, concentrate, and spray dry to obtain the water-soluble Ginkgo biloba extract.
[0043] According to the determination of Chinese Ph...
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