ENHANCING THE ANION SEPARATIONS ON A POLYDIVINYLBENZENE-BASED ANION STATIONARY PHASE

摘要

A new anion-exchange stationary phase is described for the separation of inorganic anions by ion chromatography. This stationary phase is made of polydivinylbenzene (P-DVB) based resin with dimethylethanolamine functional groups. The highly cross-linked P-DVB backbone makes this material chemically and mechanically stable under extreme chromatographic conditions. It withstands organic solvents and is stable at a wide range of pH, temperature and pressure. The separation of anions on this stationary phase can be enhanced by simple modification of the chromatographic conditions. The resolution and peak shape can be improved by adding organic additives to the eluent. These improvements can also be achieved by changing the column operating temperature. This stationary phase is useful for the separation of inorganic anions by suppressor-based and single-column ion chromatography methods.