Preparation method of astragalus polysaccharide
A technology of astragalus polysaccharides and astragalus, which is applied in the field of preparation of astragalus polysaccharides, can solve the problems of polysaccharide decomposition, high temperature, and increased production costs, and achieve the effects of low equipment and environmental requirements, reduced production costs, and high-purity extraction
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Embodiment 1
[0018] Take 100g of Astragalus membranaceus and place it in a reflux device, add 400mL of distilled water to soak for 1.5h, heat the mixture to reflux for 1h, and filter it with gauze while it is hot to get the filtrate. Add 500 mL of distilled water to the filter residue, heat the mixture to reflux for 1 h, and filter to get the filtrate. According to this method, add water to the filter residue and heat reflux twice, and filter to get the filtrate. All the filtrates were combined, centrifuged at 3000r / min for 10min, the supernatant was taken, concentrated, and adjusted to a 600mL solution with distilled water for later use. Take 600ml of the above solution, add 60ml of chitosan flocculant with a concentration of 1% by weight and volume ratio, flocculate for 24 hours, concentrate the solution after flocculation and removal of impurities to 100 mL, add 95% ethanol to make the volume ratio of alcohol reach 70%, 3 Under the temperature of ℃, after standing in the refrigerator fo...
Embodiment 2
[0020] Take 100g of Astragalus membranaceus and place it in a reflux device, add 500mL of distilled water to soak for 2h, heat the mixture to reflux for 1.5h, and filter it with a gauze while it is hot to get the filtrate. Add 400mL of distilled water to the filter residue, heat the mixture to reflux for 1.5h, and filter to get the filtrate. According to this method, add water to the filter residue, heat reflux twice, and filter to get the filtrate. All the filtrates were combined, centrifuged at 4000r / min for 15min, the supernatant was taken, concentrated, and adjusted to a 600mL solution with distilled water for later use. Take 600ml of the above solution, add 90ml of chitosan flocculant with a concentration of 1% by weight and volume ratio, flocculate for 24 hours, concentrate the solution after flocculation and removal of impurities to 100 mL, add 95% ethanol to make the volume ratio of alcohol reach 75%, 5 At the temperature of ℃, after standing in the refrigerator for 2 ...
Embodiment 3
[0022] Take 100g of Radix Astragali in a reflux device, add 600mL of distilled water to soak for 2.5h, heat the mixture to reflux for 1h, and filter it with gauze while it is hot to get the filtrate. Add 500mL of distilled water to the filter residue, heat the mixture to reflux for 1.5h, filter to get the filtrate, according to this method, add water to the filter residue, heat reflux twice, and filter to get the filtrate. Combine all the filtrates, centrifuge them at 5000r / min for 20min, remove the supernatant, concentrate, and adjust to a 600mL solution with distilled water for later use. Take 600ml of the above solution, add 120ml of chitosan flocculant with a concentration of 1% by weight and volume ratio, and flocculate for 24 hours. %, at a temperature of 4°C, a large amount of viscous precipitates were produced after standing in the refrigerator for 2.5 hours. After centrifuging at 5000r / min for 20 minutes, discard the precipitates, take the supernatant and continue to ...
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