Separation and Determination of Anions by Ion Chromatography

摘要

The separation of anions on low-capacity anion-exchange resins with eluant solutions of potassium benzoate, potassium hydrogen phthalate, or tri-potassium citrate is described. The separated anions were detected by conductivity measurements. The simultaneous separation and determination of mixtures of three to four anions were achieved. A strongly acidic cation-exchange column was used for the conversion of ion salts to acids. The use of the column resulted in a considerable enhancement of detection sensitivity, and allowed the determination of anions in concentrations as low as 10 exp -4 g/l. Experimental determinations of anions in tap water and in tungstic oxide are described. These showed sufficient promise to warrant a consideration of more fundamental studies and optimization of parameters. (ERA citation 10:002839)