Column chromatography of plant polyphenols on weak anion exchangers.

Mixtures of phenols and cinnamic acid derived plant polyphenols are separated on several WAX cellulose materials and on DEAE Sephadex. Reference mixtures are also split up into the following distinct groups: phenolic carboxylic acids--neutral o-dihydroxy phenolics--neutral non o-dihydroxy phenolics. Quantitative recoveries are obtained, while no isomerizations occur with the pH labile plant phenolics. It is suggested that these materials can be used for preparative scale purification of plant phenolics, or for cleaning up plant extracts prior to HPLC examination.