Chromatographic adhesion law to simplify surface energy calculation

Journal of Chromatography. a
Mohammad Amin Mohammad

Abstract

The calculated data of inverse gas chromatography (IGC) vary depending on the calculation methods and the n-alkane series. To overcome IGC data variability, this paper combines the Van Oss–Good–Chaudhury concept, the Dorris–Gray equation, the Schultz equation, the Fowkes equation and group contribution theory to establish the chromatographic adhesion law and its equation is K(a)(i) =e(ΔEai /kT) . In the equation, K(ai) is the adhesion retention factor of a chemical group, ΔE(ai) represents the increased chromatographic adhesion energy due to this group and kT expresses the thermal kinetic energy of the molecule contain-ing this group. The dispersive component (γ(dS) ), the electron acceptor component (γ(+S) ) and the electron donor component (γ(−S)) of a solid surface are then calculated from ΔE(ai) . Through correlating the retention time with the adhesion energy, this law expresses mathematically the chromatographic adhesion phenomenon of IGC at the infinite dilution region. This paper also derives a new equation to calculate the retention time of a non-adsorbing probe (dead retention time).

References

Nov 18, 2008·Journal of Chromatography. a·Adam VoelkelKasylda Milczewska
May 26, 2009·Journal of Chromatography. a·Magdalena PrzybyszewskaMałgorzata Iwona Szynkowska

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Citations

Jul 19, 2015·Journal of Chromatography. a·Mohammad Amin Mohammad
May 16, 2015·Journal of Chromatography. a·Mohammad Amin Mohammad
Jul 20, 2016·Colloids and Surfaces. B, Biointerfaces·Mohammad Amin MohammadBarbara R Conway

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