The Mechanism of Chromatographic Retention - Mixed Phases > Page 22

That is V'r(AB) = aV'A + (1-a)V'B (1)

where (V'A) is the retention volume of the solute on the same volume of pure phase (A)
and (V'B) is the retention volume of the solute on the same volume of pure phase (B)

V'AB = a(V'A - V'B) + V'B (2)

This remarkably simple relationship is depicted in figure 9.

Figure 9. Graph of Corrected Retention Volume against Volume Fraction of Stationary Phase