Sorption isotherms of organic vapours on Tenax

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Abstract

Sorption isotherm of o-xylene, n-octane and tetrachloroethene on Tenax were determined at different temperatures, applying vapour concentrations in the range 10–10 000 ppm. In the range up to 120 ppm the isotherms were derived from the results of breakthrough experiments; for the higher concentrations a headspace gas chromatographic method was applied. At lower gas concentrations, corresponding to bed loads of ca. 100 μmol/g Tenax, the sorption follows the Freundlich equation, whereas in the higher ppm range the isotherms become linear. For the Freundlich part of the isotherm, the isosteric heats of sorption were calculated to be in the range 40-> 100 kJ/mol.

References (10)

  • R.H. Brown et al.

    J. Chromatogr.

    (1979)
  • J. Vejrosta et al.

    J. Chromatogr.

    (1988)
  • K. Schoene et al.

    J. Chromatogr.

    (1988)
  • J. Steinhanses et al.

    J. Chromatogr.

    (1990)
  • R. van Wijk

    J. Chromatogr. Sci.

    (1970)
There are more references available in the full text version of this article.

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