Method for preparing high-purity calycosin
A technology of high-purity multi-isoflavone, applied in the field of preparation of high-purity multi-isoflavone, can solve the problems of large solvent consumption, low distribution efficiency, sample adsorption, etc., and achieves the effects of large separation volume, solvent saving, and separation environment alleviation.
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Embodiment 1
[0033] Select methyl acetate-n-propanol-ethanol-water system on a semi-preparative countercurrent chromatograph to separate and purify astragalus calycosin. The suitable temperature for the experiment is 20°C. Firstly, the above-mentioned solvent components are distributed and placed in a separatory funnel according to the volume ratio of 4:0.8:2:2, shaken and then allowed to stand for stratification. After equilibrating for a period of time, separate the upper and lower phases. A semi-preparative countercurrent chromatograph is used, equipped with a polytetrafluoroethylene column, a 20ml injection valve, a column volume of 300ml, a TBP-50A pump, a TBD-23 detector and an N2000 chromatographic workstation. Weigh 100 mg of Astragalus crude sample and dissolve it in a solution composed of 10 ml upper phase and 10 ml lower phase for use. Before sample injection, fill the entire column with stationary phase, adjust the speed of the main engine to 950rpm, and pump the mobile phase ...
Embodiment 2
[0035] Select ethyl acetate-n-butanol-ethanol-water system on a semi-preparative countercurrent chromatograph to separate and purify astragalus calycosin. The suitable temperature for the experiment is 30°C. Firstly, the above-mentioned solvent components are distributed and placed in a separatory funnel according to the volume ratio of 3:0.5:1:8, shaken and then allowed to stand for stratification. After equilibrating for a period of time, separate the upper and lower phases. A semi-preparative countercurrent chromatograph is used, equipped with a polytetrafluoroethylene column, a 20ml injection valve, a column volume of 300ml, a TBP-50A pump, a TBD-23 detector and an N2000 chromatographic workstation. Weigh 150mg crude astragalus sample and dissolve in 10ml upper phase and 10ml lower phase solution for later use. Before sample injection, fill the entire column with stationary phase, adjust the speed of the main engine to 650rpm, and pump the mobile phase into the column at ...
Embodiment 3
[0037]Select butyl acetate-n-propanol-ethanol-water system to separate and purify astragalus calycosin isoflavones on a semi-preparative countercurrent chromatograph. The suitable temperature for the experiment is 22°C. Firstly, the above-mentioned solvent components are distributed in a separatory funnel according to the volume ratio of 4:1:1:6, shaken and allowed to stand to separate into layers. After equilibrating for a period of time, separate the upper and lower phases. A semi-preparative countercurrent chromatograph is used, equipped with a polytetrafluoroethylene column, a 20ml injection valve, a column volume of 300ml, a TBP-50A pump, a TBD-23 detector and an N2000 chromatographic workstation. Weigh 150mg crude astragalus sample and dissolve in 10ml upper phase and 10ml lower phase solution for later use. Before sample injection, fill the entire column with stationary phase, adjust the speed of the main engine to 750rpm, and pump the mobile phase into the column at a...
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