title: Chromatographic behaviour of phenols on thin layers of cation and anion exchangers. II. Dowex 50-X4 and Rexyn 102.
abstract: The chromatographic characteristics of 58 phenols on Rexyn 102 and Dowex 50-X4 thin layers in both the acidic and sodium salt forms have been studied, using elution with water, water-alcohol mixtures and aqueous salt solutions at different pH values. The influence of the percentage of alcohol, the pH and the ionic strength on the chromatographic behaviour of these phenols was investigated. The validity of the relationships among the RF values, the pH of the eluent and the pKa of the phenol has been verified on Dowex 50-X4 (Na+) thin layers. It has been shown that from the RFac, RFalk and pKa values of the different phenols, it is possible to predict their behaviour over the whole pH range and therefore to select the best conditions for their chromatographic separation.
mesh_terms: D000085:Acetates; D000641:Ammonia; D001639:Bicarbonates; D002254:Carbonates; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002852:Chromatography, Ion Exchange / Q000379:methods*; D002855:Chromatography, Thin Layer / Q000379:methods*; D004140:Dinitrophenols / Q000032:analysis; D000431:Ethanol; D006851:Hydrochloric Acid; D006863:Hydrogen-Ion Concentration; D010636:Phenols / Q000032:analysis*; D012964:Sodium; D014867:Water
chemical_list: D000085:Acetates; D001639:Bicarbonates; D002254:Carbonates; D004140:Dinitrophenols; D010636:Phenols; D014867:Water; D000431:Ethanol; D000641:Ammonia; D012964:Sodium; D006851:Hydrochloric Acid