Zeitschrift für Chromatographie und Trenntechniken
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An Attempt to Chromatographic Determination of Acceptor-Donor Properties of Liquid Crystals

Henryk Grajek* and Marcin Purchała

In order to obtain the most valuable information the Gibbs free energies of adsorption or solution, ΔG, should have been estimated in three ways on the basis of the retention times of the centre of gravity of the elution peak of the substances with defined physico-chemical properties. The temperature dependent van der Waals component of the surface free energy, dW s ν γ , has been estimated by employing the Dorris-Gray method and the Schultz method. The suggested approach has also been employed for carbon adsorbents on the basis of various literature data.