https://doi.org/10.1351/goldbook.C01225
The ratio of the analytical concentration of a component in the @[email protected] to its analytical concentration in the @[email protected] \[D_{\text{c}}=\frac{\text{amount of component}/\text{cm}^{3}\text{of stationary phase}}{\text{amount of component}/\text{cm}^{3}\text{of mobile phase}}\]