Technique for preparing verbascoside with function of curing chronic glomerulonephritis in glutinous rehmannia leaf
A technology of acteoside and glomerulonephritis, applied in the field of traditional Chinese medicine, with high rate, reliable quantification procedure and clear steps
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[0028] The dried rehmannia leaves were refluxed with acidic ethanol, extracted twice for 60 minutes each time, the two extracts were combined, concentrated, and ethanol was added to the concentrated solution to reach an alcohol content of 40%, and left overnight. Filter, dilute the supernatant with water until the alcohol content is 15%, let it stand overnight, take the supernatant and add it to the qualified SP825 macroporous resin column, first elute with water, then elute with 15% ethanol, and then elute with 40% ethanol was eluted, and the 40% ethanol eluate was collected and concentrated to a small volume (no alcohol smell), dried in vacuum at low temperature, and crushed into fine powder (60 mesh sieve). Dissolve in acetone, filter, decolorize with activated carbon, and filter. Concentrate acetone to a small volume, dry in vacuum at low temperature, pulverize into a fine powder (80 mesh sieve), and recrystallize with acid water.
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