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Chromatographia

, Volume 44, Issue 3–4, pp 179–186 | Cite as

Thermodynamic properties of alkylbenzenes from retention-boiling point correlations in gas chromatography

  • K. Héberger
  • T. Kowalska
Originals

Summary

A thermodynamic interpretation of the empirical correlation between retention and boiling point for alkylbenzenes in stationary phases of low and medium polarity has been found. The transfer of molecules between the liquid and mobile phases was assumed to be similar to, although not identical with, vaporization of any given pure liquid and characterized using the Trouton's rule.

The two equations developed relate relative retentions to solute boiling point and two systems constants under a given set of conditions. The first equation was found to give a better description since it involves fewer assumptions and approximations.

Validity of the model was confirmed by agreement between theoretical and experimental values for equation constants although the agreement becomes poorer as the stationary phase polarity increases. The relationships discussed are applicable to all congeneric solutes of low polarity in stationary phases of medium polarity.

Key Words

Gas chromatography Retention-boiling point correlation Trouton's rule Alkylbenzenes 

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Copyright information

© Friedr. Vieweg & Sohn Verlagsgesellschaft mbH 1997

Authors and Affiliations

  • K. Héberger
    • 1
  • T. Kowalska
    • 2
  1. 1.Central Research Institute for ChemistryHungarian Academy of SciencesBudapestHungary
  2. 2.Institute of ChemistrySilesian UniversityKatowicePoland

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