column

in chromatography
https://doi.org/10.1351/goldbook.C01181
The tube and the stationary phase contained within, through which the mobile phase passes.
Sources:
Orange Book, 2nd ed., p. 97 [Terms]
PAC, 1993, 65, 819. (Nomenclature for chromatography (IUPAC Recommendations 1993)) on page 831 [Terms] [Paper]