liquid or gaseous mixtures that contain at least one component that adsorbs
liquid or gaseous solutions that contain several components with differing affinities for the stationary phase
gaseous mixtures containing at least one gas with a much higher boiling point than the others
solutions containing small molecules mixed with very large molecules
gaseous mixtures containing gases with different molecular weights
mixtures of solids with different solubilities
solid mixtures with a metal as one component
heterogeneous mixture containing a solid phase
heterogeneous mixture with phases with different densities
solutions containing ions
solutions containing a solute that can be precipitated
gaseous mixtures containing a solute that can be selectively absorbed by a scrubbing solution
a liquid mixture containing at least one volatile component
a mixture containing components with differing volatility