convex isotherm

in chromatography
https://doi.org/10.1351/goldbook.CT06937
distribution isotherm, the slope of which is continuously decreasing.
Note:
The resulting chromatographic peak is @T06249@. Adsorption isotherms are often of this type. A special case is the Langmuir adsorption isotherm.
Source:
PAC, 1996, 68, 1591. 'Nomenclature for non-linear chromatography (IUPAC Recommendations 1996)' on page 1593 (https://doi.org/10.1351/pac199668081591)