Evaluation of core-shell particle columns for ion-pair reversed-phase liquid chromatography analysis of oligonucleotides.

Abstract An investigation into the use of core–shell particle columns for separation of short (∼21 base pairs) RNA oligonucleotides by ion-pair reversed-phase liquid chromatography (IP-RPLC) showed improved resolution for a number of test analytes relative to conventional (fully-porous) reversed-phase columns. The best resolutions were obtained using columns packed with smaller sub-2 μm core–shell particles.