Temperature dependence of kováts indices in gas chromatography. Explanation of empirical constants by use of transition-state theory

• Autorzy: Kowalska T. , Héberger K. , Görgényi M.
• Języki publikacji: EN

Abstrakty

EN

The temperature dependence of Kováts indices is best described by use of the empirical equation I = A + B/T + C lnT [1]. This paper discusses the physical significance of the equation constants linked to the 1/T and lnT terms. The explanation presented here is based on transition state theory, i.e. the activation energy assumed to be associated with the solvation process. Because the literature contains no measured activation energy data for the solvation process, elucidation of the physical meaning of other terms might be an acceptable alternative. The Gibbs free energy for one methylene unit can be calculated and compared with literature values. The activation energy of the solvation process changes systematically.

• Wydawca: University of Silesia in Katowice ; Akademiai Kiado
• Czasopismo: Acta Chromatographica
• Rocznik: 2003
• Tom: No. 13
• Strony: 60--68
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Kowalska T.

• Institute of Chemistry, Silesian University, 9 Szkolna Street, 40-006 Katowice, Poland

autor

Héberger K.

• Institute of Chemistry, Chemical Research Centre, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 17, Hungary

autor

Görgényi M.

• Institute of Physical Chemistry, University of Szeged, H-6701 Szeged, P.O. Box 105, Hungary

Bibliografia

• [1] K. Héberger, M. Görgényi, and T. Kowalska, J. Chromatogr. A, 973, 135 (2002)
• [2] H. Rotzsche, Stationary Phases in Gas Chromatography, Journal of Chromatography Library, Vol. 48, Elsevier, Amsterdam, 1991
• [3] E. Tudor, J. Chromatogr. A, 779, 287 (1997)
• [4] E. Tudor, J. Chromatogr. A, 848, 215 (1999)
• [5] E. Tudor, J. Chromatogr. A, 858, 65 (1999)
• [6] P. Hennig and W. Engewald, Chromatographia, 38, 93 (1994)
• [7] St.J. Hawkes, Chromatographia, 25, 313 (1988)
• [8] K. Héberger and T. Kowalska, Chromatographia, 48, 89 (1998)
• [9] K. Héberger, T. Kowalska, and M. Görgényi, Acta Chromatographica, 9, 25 (1999)
• [10] K. Héberger and T. Kowalska, Chemom. Intell. Lab. Syst., 47, 205 (1999)
• [11] K. Ciążyńska – Halarewicz, E. Borucka, and T. Kowalska, Acta Chromatographica, 12, 65 (2002)
• [12] H. Eyring, J. Chem. Phys. 3, 107 (1935)
• [13] M.G. Evans and M. Polanyi, Trans. Faraday Soc. 31, 875 (1935)
• [14] J.N. Brønsted and K. Pedersen, Z. Phys. Chem., 108, 185 (1924)
• [15] K. Héberger and T. Kowalska, Chromatographia, 44, 179 (1997)
• [16] K. Héberger and T. Kowalska, J. Chromatogr. A, 845, 13 (1999)
• [17] V. Pacáková and L. Feltl, Chromatographic Retention Indices an Aid to Identification of Organic Compounds, Ellis Horwood, New York, 1992
• [18] K. Héberger and M. Görgényi, J. Chromatogr. Sci. 38, 113 (2001)
• [19] R.C. Castells, E.L. Arancibia, and A.M. Nardillo, J. Chromatogr., 504, 45 (1990)
• [20] M. Görgényi and K. Héberger, J. Chromatogr. Sci. 37, 11 (1999)
• [21] M.V. Budahegyi, E.R. Lombosi, T.S. Lombosi, S.Y. Mészáros, Sz. Nyiredy, G. Tarján, I. Timár, and J. M. Takács, J. Chromatogr., 271, 213 (1983)
• [22] L.I. Dernovaya and Yu. A. Eltekhov, J. Chromatogr., 520, 47 (1990) - 68