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The influence of mobile phase composition on the retention of selected test analytes in different normal- and reversed-phase chromatographic systems is studied. A novel adsorption model for an accurate prediction of the analyte retention in the column chromatography with binary mobile phase is proposed. Performance of the model is compared with the retention model reported in the literature. Both models are verified for different HPLC systems by use of three criteria: (a). the sum of squared differences between the experimental and theoretical data, (b). approximation of the standard deviation, and (c). the Fisher test.

Influence of Mobile Phase Composition on Retention Factors in Different HPLC Systems with Chemically Bonded Stationary Phases