Chromatography in which parts or all of the separated sample components are subjected to additional separation steps.
Note: Multi-dimensional chromatography can be done, for example, by conducting a particular fraction eluting from the column into other columns (system) having different separation characteristics.
Source:
PAC, 2017, 90, 181. 'Terminology of separation methods (IUPAC Recommendations 2017)' on page 209 (https://doi.org/10.1515/pac-2017-0111)