Chromatographic separation map and incremental relationships in the method of relative analysis of retention under HPLC conditions

It was demonstrated that the correlations between the logarithms of the retention factors for various pairs of substances being linear makes it possible to plot and analyze maps of separation of complex mixtures at various mobile phase compositions on the basis of two measurements at the boundaries of the eluent composition range. Applied to the available experimental data, the relative analysis of retention showed that the use of incremental relationships in the form of the difference between the retention parameters for the corresponding substances at a given mobile phase composition is incorrect. A substantiation of the new method was presented.