ascending elution (ascending development)

in planar chromatography
https://doi.org/10.1351/goldbook.A00466
A @[email protected] of operation in which the paper or plate is in a vertical or slanted position and the mobile phase is supplied to its lower edge; the upward movement depends on capillary action.
Source:
PAC, 1993, 65, 819. (Nomenclature for chromatography (IUPAC Recommendations 1993)) on page 829 [Terms] [Paper]