Organic solutes adsorption, from aqueous Subject

As concerns the isolation of Buxus alkaloids, this was conducted by extraction of the plant material with a suitable organic solvent directly (id) or after previous treatment with acetic acid (52, 180, 187) or after basification with ammonia or soda (188). The total alkaloids were often fractionated into weak and strong basic portions by extraction from aqueous solutions of alkaloid salts at appropriate pH and then subjected to separation by means of adsorption or partition chromatography (189). 

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