Abstract: Ageneral model was established to describe the convergent phenomenon of ho-mologous series on the basis of discussion about the factors affecting solute retention be-haviour. The regression analysis for 12 kinds of homologous series(38 groups of data) was completed in six different mobile phases and on eight stationary phases,respectively.The results indicate that the correlation coefficient r≥0.974, standard deviation SD≥0.05. The surface and the projection of these homologous series' retention values have been drawn in three and two dimension,respectively.Convergent phenomenon and its meaning are also dis-cussed based on these graphs. Asimple method for calculating the convergent point coordi-nates is derived by using the first partial derivative.

Key words: High-performance liquid-phase chromatography, Homologous series, Retention value, Convergence