Abstract
The chromatographic behaviour of 16 aminophosphonic acids on anion and cation exchangers with polystyrene-, paraffin- and cellulose-based matrices has been investigated. The eluents used were buffer solutions, mineral and organic acid solutions and water-organic solvent mixtures. Interesting results were achieved with two successive developments in the same eluent. On polystyrene-based anion exchangers, an unusual pH gradient forms, which determines the chromatographic behaviour of the aminophosphonic acids at changing buffer concentrations.
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