Retention modeling and retention time prediction in gas chromatography and flow-modulation comprehensive two-dimensional gas chromatography: The contribution of pressure on solute partition.

•The effects of pressure of solute partition and retention in GC.•Improvement of predicted retention time accuracy considering pressure contribution.•The relevance of considering pressure in GC and FM-GCxGC.•A new method for stationary phase film thickness determination.•The accuracy of gas velocity calculation in the two columns in FM-GCxGC.