Method for separating and purifying gelsevirine, koumidine, koumine, gelsemine and furan koumine from gelsemium elegans benth
A technology of kelezin and kellycetin, which is applied in the field of natural medicine extraction, can solve the problems of waste of active ingredients, inability to separate multiple drug ingredients at the same time, and low yield of active ingredients, so as to ensure repeated use, low cost, Simple operation effect
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[0035] Extraction: add 800L of 0.5% sulfuric acid solution to 100kg of crushed Glycyrrhizae, stir and extract in an acid-resistant extraction tank with a capacity of 1000L for 24 hours, filter the medicinal liquid with a 200-mesh filter, extract the medicinal residue once more in the same way, and combine the two The secondary extract is adjusted to neutral pH with sodium hydroxide (8mol / L), then concentrated in a concentration tank to a relative density of about 1.2, and dried under reduced pressure to obtain the product. Weigh 1 kg of gousilic acid water extract, put it into a 5L round-bottomed distillation bottle, add 90% ethanol to reflux and extract twice, add 1.5L each time, extract for 2 hours, and collect the extract twice after simply filtering it through gauze , combined and placed to settle for 2 hours, then centrifuged in a centrifuge to obtain a centrifuge, concentrate the centrifuge to obtain an extract, add hot water at 45-55°C to dissolve, freeze-dry at -20°C fo...
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