Method for separating and extracting Milkvetch Root
A technology of astragalus and medicinal materials, applied in the field of medicine, can solve problems such as different extraction methods and unsuitable traditional Chinese medicinal materials
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Embodiment 1
[0091] (1) Extraction process: Weigh 250g of Radix Astragali, crush it and sieve it, then add 8 times of ethyl acetate and ethanol with a volume ratio of 1:1, heat and reflux for 3 hours, extract twice, and combine the filtrates to obtain the extraction liquid fr.1. Add 10 times the amount of 70% ethanol to the dregs, heat and reflux for 2.5 hours, extract twice, and combine the filtrates to obtain the extract fr.2. Finally add water to the dregs, heat and reflux for 2 hours, extract twice, and combine the filtrates to obtain the extract fr.3.
[0092] (2) Separation process: Concentrate the extract fr.1 to obtain 33.8g extract, mix the sample with silica gel, and use a normal phase silica gel column to separate it. First, petroleum ether and ethyl acetate with a volume ratio of 50:1 are used as Mobile phase, to obtain eluent fr.4, then change the volume ratio of chloroform and methanol as mobile phase to obtain eluent fr.5, concentrate to obtain 3.4g sample, finally use meth...
Embodiment 2
[0121](1) Extraction process: Weigh 500g of Radix Astragali, crush it and sieve it, then add 10 times of ethyl acetate and ethanol with a volume ratio of 1:1, heat and reflux for 2 hours, extract 3 times, and combine the filtrates to obtain the extraction liquid fr.1. Add 5 times the amount of 70% ethanol to the dregs, heat and reflux for 2.0 hours, extract 3 times, and combine the filtrates to obtain the extract fr.2. Finally add water to the dregs, heat and reflux for 1.5 hours, extract 3 times, and combine the filtrates to obtain the extract fr.3.
[0122] (2) Separation process: Concentrate the extract fr.1 to obtain 73.0g of extract, mix the sample with silica gel, and use a normal phase silica gel column to separate it. First, petroleum ether and ethyl acetate with a volume ratio of 50:1 are used as Mobile phase, to obtain eluent fr.4, then change the volume ratio of chloroform and methanol as mobile phase to obtain eluent fr.5, concentrate to obtain 7.0g sample, finall...
Embodiment 3
[0151] 1. Extraction and separation of Astragalus medicinal materials
[0152] (1) Extraction process: Weigh 250g of Radix Astragali medicinal material, crush it and sieve it, then add 8 times of ethyl acetate and ethanol with a volume ratio of 1:1, heat and reflux for 1 hour, extract twice, and combine the filtrates to obtain the extraction liquid fr.1. Add 8 times the amount of 70% ethanol to the dregs, heat and reflux for 1 hour, extract twice, and combine the filtrates to obtain the extract fr.2. Finally add water to the dregs, heat and reflux for 1 hour, extract twice, and combine the filtrates to obtain the extract fr.3.
[0153] (2) Separation process: Concentrate the extract fr.1 to obtain 36.8g extract, mix the sample with silica gel, and use a normal phase silica gel column to separate it. First, petroleum ether and ethyl acetate with a volume ratio of 50:1 are used as Mobile phase, to obtain eluent fr.4, then replace the chloroform and meth...
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