Bauhinia championii acetic ether extract, n-butyl alcohol extract and preparation methods and applications thereof
一种乙酸乙酯提取、龙须藤的技术,应用在药物领域,达到药效明确、质量可控、制备方法稳定的效果
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[0037] Example 1 Separation and purification of the components of the ethyl acetate part and n-butanol part of Astragalus
[0038] 1. Extraction and separation
[0039] Take 1000g of the medicinal material of Astragalus chinensis, add 80% ethanol and heat it under reflux to extract 3 times, each time for 1.5h, filter, combine the ethanol solution, recover the ethanol until it has no alcohol smell, and obtain the alcohol extraction extract. Add 2000ml of water to suspend the extract, add petroleum ether to extract 5 times, 1000ml / time, combine the petroleum ether extract, recycle, and obtain an oily substance; add chloroform to the water layer and extract 5 times, 1000ml / time, combine the chloroform extract, Recover and dry to obtain extract; Add ethyl acetate to extract the water layer 5 times, 1000ml / time, combine ethyl acetate extract, recover, dry to obtain extract; Add n-butanol to extract 5 times, 1000ml Each time, the n-butanol extract was combined, recovered, dried to ...
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