A Thermodynamically Consistent Formulation of the Fundamental Equation in Inverse Gas Chromatography for an Accurate Determination of Solid Surface Properties
Abstract
, Σ) accounts for temperature and specific surface area effects. Applied to 17 solid surfaces and 19 solvents, the deviation function proved essential, as the classical models produced errors exceeding 1000%. Errors decreased with an increasing surface area, confirming the physical origin of the deviation. This framework redefines the thermodynamic foundation of IGC, enabling accurate determination of dispersive and polar surface energies and necessitates a reevaluation of decades of published data. Although both van der Waals and Redlich-Kwong equations correct the classical IGC formulation, the Redlich-Kwong model yields the best agreement with experimental data with discrepancies between models diminishing as the solid surface area increases.
Fields of Study & Subjects
Adsorption
diffusion
and thermodynamic properties of materials
Membrane Separation and Gas Transport
Analytical Chemistry and Chromatography
Publication details
- Journal / source
- Precision Chemistry
- Publisher
- American Chemical Society (ACS)
- Volume
- 4
- Issue
- 3
- Pages
- 323–337
- Publication date
- 22 January 2026
- Language
- EN