The Mechanism of Chromatographic Retention - Chromatographic Interactions > Dispersive Interactions > Page 5
|where (r)||is the density of the medium,|
|(M)||is the molecular weight,|
|(NA)||is Avogadro's Number|
|and (PM)||is the molar polarizability, noting that the number of molecules per unit volume is Nr/M.|
The molar polarizability is an inverse function of , the molar volume. A schematic of dispersive interactions is shown in figure 1.
Figure 1. Schematic Representation of Dispersive Interaction