Separation of alkaloids by pH-zone-refining counter-current chromatography.
pH-Zone-refining counter-current chromatography was applied to the separation of alkaloids from a crude extract of Crinum moorei using a multilayer coil planet centrifuge. After methyl tert.-butyl ether and water were equilibrated, triethylamine (5-10 mM) was added to the organic phase and hydrochloric acid (5-10 mM) to the aqueous phase. The separation was performed by eluting the column with either the organic phase (displacement mode) or the aqueous phase (reverse-displacement mode) while the other phase was used as the stationary phase. From 3 g of the extract, crinine, powelline and crinamidine were separated in 2.5-7 h with minimum overlapping.
Laboratory of Biophysical Chemistry, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892.
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Ma
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Ito
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Sokolosky
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Fales
D000470:Alkaloids / Q000302:isolation & purification*; D002853:Chromatography, Liquid / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D010944:Plants / Q000737:chemistry
D000470:Alkaloids