linear distribution isotherm

in chromatography
https://doi.org/10.1351/goldbook.LT06935
A @DT06932-1@ which can be approximated as \(c_{\text{s}} = K_{\text{C}}.c_{\text{M}}\) where \(K_{\text{C}}\) is a constant.
Note:
At low concentrations, all @DT06932-2@ tend towards being linear. \(K_{\text{C}}\) is the @D01813@.
Source:
PAC, 1996, 68, 1591. (Nomenclature for non-linear chromatography (IUPAC Recommendations 1996)) on page 1593 [Terms] [Paper]