Indirect detection in reversed-phase liquid chromatography: Ion-pair retention models for anionic analytes and mobile phase components on polystyrene polymers using an alkaline mobile phase

Retention models for anionic analytes and mobile phase compounds in reversed-phase ion-pair chromatographic systems have been studied. The solid phase was a polystyrene-divinylbenzene copolymer. The analytes were mono- and divalent anions monitored by indirect detection technique. The mobile phase was highly alkaline and contained a detectable anion, sulfanilic acid.