Abstract

Interfacial adsorption is shown to influence the gas chromatographic retention behaviour of hydrocarbons when using glycols as stationary phases. This interfacial effect can be neglected only for lower aromatic hydrocarbons, as demonstrated by the determination of partition and interfacial adsorption coefficients. Activity coefficient at infinite dilution were calculated; they compare favourably with those determined statically when using the method proposed by Martire et al. for the evaluation of exposed areas, whereas the use of experimental values given by Serpinet et al. led to erratic results. Solution and adsorption thermodynamic characteristics of the systems studied are briefly discussed.

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