# Dispersion in Chromatography Columns - The Alternative Axes of a Chromatogram > Page 4

**Figure
1 Alternative Axes of a Chromatogram**

** **

As the curves are describing the same chromatogram, by proportion, the ratio of the variance to the square of the retention, in the respective units in which the independent variables are defined, will all be equal.

Consequently,

where s_{v}, s_{x}
and s_{t} are the standard
deviations of the elution curves

when related to the volume flow of mobile