, Volume 17, Issue 9, pp 481–485

Practical aspects of the dependence of polarity on temperature

  • K. Grob
  • G. Grob


It is not commonly appreciated that retention indices are temperature dependent. It is even less common to express this fact in more practical terms by saying that polarity is temperature dependent. Although the meaning of both statements is identical, we believe the second to be particularly relevant, since the majority of practical gas chromatographers tends to handle polarity as an invariable characteristic of a stationary phase.

The variability of polarity with temperature is the major source of inadequate reproducibility of exact finger-printing, this particularly when gc/ms traces have to be compared to those obtained by pure gc. On the other hand, the temperature dependence provides a practical means to optimize the polarity of a given column for a given analysis. Film thickness is an essential parameter in this context because of its influence on column temperature and, therefore, on column polarity.

Key Words

Polarity Stationary phases Temperature dependence GC 


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  1. [1]
    E. sz. Kovats, Advances in Chromatography, J. C. Giddings and R. A. Keller Editors, Marcel Dekker, Inc., New York 1965, Vol. 1, p. 234–235.Google Scholar
  2. [2]
    L. Rohrschneider, ibidem, Vol. 4, New York 1967, p. 346, 348.Google Scholar
  3. [3]
    G. Schomburg, ibidem, Vol. 6, New York 1968, p. 213.Google Scholar
  4. [4]
    S. R. Lowry, H. B. Woodruff, T. L. Isenhour, J. Chromatogr. Sci.14, 129 (1976).Google Scholar
  5. [5]
    W. L. Zielinsky, D. E. Martire, Anal. Chem.48, 1111 (1976).Google Scholar
  6. [6]
    S. Rang, K. Kuningas, A. Orav, O. Eisen, J. Chromatogr.128, 53 (1976).Google Scholar
  7. [7]
    D. Gross, H. Z. Weigel, Z. anal. Chem.277, 31 (1975).Google Scholar
  8. [8]
    L. Sojak, J. A. Rijks, J. Chromatogr.119, 505 (1976).Google Scholar
  9. [9]
    G. Schomburg, Gaschromatographie, Verlag Chemie, Taschentext Nr. 48, Weinheim 1977, p. 64, 65.Google Scholar
  10. [10]
    M. L. Lee, D. L. Vassilaros, C. M. White, M. Novotny, Anal. Chem.51, 768 (1979).Google Scholar
  11. [11]
    W. Jennings, Gas Chromatography with Glass Capillary Columns, II Edit., Academic Press, New York 1980, p. 121, 122.Google Scholar
  12. [12]
    E. Schulte, Praxis der Kapillar-Gaschromatographie, Springer, Heidelberg 1983, p. 42, 82.Google Scholar
  13. [13]
    H. Knöppel, M. de Bortoli, A. Peil, H. Vissers, V. Internat. Symposium on Cap. Chromatogr., Proceedings, Elsevier, Amsterdam 1983, p. 863.Google Scholar
  14. [14]
    I. O. O. Korhonen, Chromatographia17, 195 (1983).Google Scholar
  15. [15]
    I. O. O. Korhonen, Chromatographia17, 70 (1983).Google Scholar
  16. [16]
    K. Grob, G. Grob, HRC+CC6, 133 (1983).Google Scholar
  17. [17]
    K. Grob, G. Grob, K. Grob Jr., J. Chromatogr.219, 13 (1981).Google Scholar

Copyright information

© Friedr. Vieweg & Sohn Verlagsgesellschaft mbH 1983

Authors and Affiliations

  • K. Grob
    • 1
  • G. Grob
    • 1
  1. 1.GC-LaboratoryETH Zürich; EAWAGDübendorfSwitzerland

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