Abstract
Inverse gas chromatographic experiments carried out between 80 and 140°C were used to characterize Superox 20M deposited on glass capillary columns, using 28 substances belonging to five different chemical types. No absorption in the gas—liquid interphase was observed except in three cases corresponding to the highest molecular masses. The thermodynamic parameters of solution and mixing and the Flory—Huggins solute—stationary phase interaction parameter were measured. The dependences of all magnitudes on temperature and chain length were also calculated, and conclusions on the relationship between their values and the chromatographic behaviour of the solutes in the stationary phase were drawn. The solubility parameter of Superox 20M was measured between 80 and 140°C and was found to have a linear dependence on temperature. Values at 50, 64 and 280°C were deduced.
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