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

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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.

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Authors and Affiliations

  1. Department of Analytical Chemistry, Faculty of Chemical Technology, Slovak Technical University, 812 37, Bratislava, Czechoslovakia

    E. Matisová, D. Hudec & J. Garaj

  2. Chemistry Section, Martin Luther University Halle-Wittenberg, 4010, Halle, German Democratic Republic

    G. Kraus, M. Schierhorn & A. Isenberg

Authors
  1. E. Matisová
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  2. D. Hudec
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  3. J. Garaj
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  4. G. Kraus
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  5. M. Schierhorn
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  6. A. Isenberg
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Additional information

Dedicated to Professor J. F. K. Huber on the occasion of the his 60th birthday.

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Matisová, E., Hudec, D., Garaj, J. et al. The dependence of the properties of liquid crystals on the film thickness and surface quality of capillary columns. Chromatographia 20, 601–608 (1985). https://doi.org/10.1007/BF02263219

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  • DOI: https://doi.org/10.1007/BF02263219

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