Comparison of methods for the determination of the polarity and selectivity of stationary phases in gas chromatography from a thermodynamic point of view

Different scales proposed for the evaluation of polarity and selectivity in gas chromatography as relative and absolute values were compared. It is shown that the scale including six parameters, Δ G( X), Δ G( Y), Δ G( Z), Δ G( U), Δ G( S), and Δ G(CH 2), is more suitable and allows a unified system...

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Bibliographic Details
Published in:Journal of Chromatography A 1990-09, Vol.517, p.51-66
Main Authors: Golovnya, R.V., Polanuer, B.M.
Format: Article
Language:English
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Summary:Different scales proposed for the evaluation of polarity and selectivity in gas chromatography as relative and absolute values were compared. It is shown that the scale including six parameters, Δ G( X), Δ G( Y), Δ G( Z), Δ G( U), Δ G( S), and Δ G(CH 2), is more suitable and allows a unified system to be obtained for the polarity and selectivity of conventional stationary phases, organic and inorganic salts and polymer sorbents. The main equation for the calculation of the partial molar free energy of sorption, Δ G, is simplified for capillary gas chromatography.
ISSN:0021-9673
DOI:10.1016/S0021-9673(01)95709-7