ion-exchange chromatography 

https://doi.org/10.1351/goldbook.I03168
Chromatography in which separation is based mainly on differences in the ion-exchange affinities of the sample components. Present day ion-exchange chromatography on small particle high efficiency columns, and usually utilizing conductometric or spectroscopic detectors, is often referred to as ion chromatography (IC).
Source:
PAC, 1993, 65, 819. (Nomenclature for chromatography (IUPAC Recommendations 1993)) on page 826 [Terms] [Paper]