Chromatography is a widely used technology in separation of different molecules. It can be categarized from different perspective.
Different stationary phase and mobile phase--Gas chromatography，Liquid chromatography;
Different pressure and application--HPLC, FPLC;
Different resin ligand-Affinity chromatography, Ion exchange chromatography, size exclusion chromatography or gel filtration chromatography, hydrophobic interaction chromatography, mult-mode chromatography, reverse phase chromatography etc.
Analytical chromatography，preparative chromatography
Column chromatography, thin-layer chromatography, paper chromatography, etc.