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Chromatographia

, Volume 20, Issue 10, pp 601–608 | Cite as

The dependence of the properties of liquid crystals on the film thickness and surface quality of capillary columns

  • E. Matisová
  • D. Hudec
  • J. Garaj
  • G. Kraus
  • M. Schierhorn
  • A. Isenberg
Originals

Summary

Glass capillary columns were prepared from non-deactivated and deactivated glass and coated with (2-methyl-4-[trans-4-n-propyl-cyclohexylcarbonyloxy]-benzoic acid-[4-n-heptyloxy-phenylester]) as the liqud phase, in different film thicknesses. The columns were tested using substances of different structures and polarities. It was verified that the capacity factors, retention indices and selectivity significantly depend on the thickness of the liquid crystalline stationary phase film and the quality of the tube, particularly in the case of columns with thin films. Trasition temperatures (melting and clearing point) of the liquid crystal are also dependent on these two factors.

Key Words

Gas chromatography Liquid crystal Capillary columns Retention data Stationary phase film thickness Column surface quality 

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Copyright information

© Friedr. Vieweg & Sohn Verlagsgesellschaft mbH 1985

Authors and Affiliations

  • E. Matisová
    • 1
  • D. Hudec
    • 1
  • J. Garaj
    • 1
  • G. Kraus
    • 2
  • M. Schierhorn
    • 2
  • A. Isenberg
    • 2
  1. 1.Department of Analytical Chemistry, Faculty of Chemical TechnologySlovak Technical UniversityBratislavaCzechoslovakia
  2. 2.Chemistry SectionMartin Luther University Halle-WittenbergHalleGerman Democratic Republic

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