Abstract
The model of interaction indices is used as the basis for the derivation of equations describing the retention of homologous series in reversed-phase liquid chromatography. Linear relationships between the retention and the mobile phase composition can be used to a first approximation in binary mobile phases containing 40–50% or more ofmethanol, acetonitrile or 1,4-dioxane in water. For these mobile phases, a general equation was derived that makes possible predictions of capacity factors of various homologues in binary mobile phases with diferent proportions of organic solvent to water, based on a single experimental capacity factor ofone homologue. The meaning of the constants of this equation and their dependence on various factors are discussed.
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