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The activity coefficients of the binary mixtures ethanol + 1-butanol, ethanol + octane, and 1-butanol + octane were determined at temperatures of (308.15, 313.15, and 318.15) K. The determination of the vapor phase composition at equilibrium was carried out using headspace gas chromatography analysis. Multiple headspace extraction was used to calibrate the headspace gas chromatograph. Comparison of the phase diagrams produced using standard Legendre orthogonal polynomial techniques with phase diagrams from the literature showed good agreement. The composition of the azeotropes were reported, where applicable.

The growth-dependent production of known and new potential tracer compounds for moulds of the genus Peniciflium on pine wood is shown. The analytical method used involves diffusive sampling by an adsorbent tube (Tenax-TA) , thermal desorption, gas chromatography and a mass selective detector. Mass spectra of identified and unidentified potential tracer compounds are presented. Identified compounds are l-Octene-3-01,2-Heptanone, 4 -Allylanisole and 3-Methyl-l-butanol. In addition, several other compounds were tentatively identified or recognized in different samples by their retention time and mass spectra. The microbiologically produced volatile organic compounds (MVOC) are produced during different time periods of the mould growth cycle. The impact of these results on screening measurements for houses with mould problems is discussed together with the applicability and need for new and more tracer compounds for mould growth in buildings.

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The activity coefficients of the binary mixtures ethanol + 2,2,4-trimethylpentane, 1-butanol + 2,2,4trimethylpentane, and ethanol + o-xylene were determined at temperatures of (308.15, 313.15, and 318.15) K. The determination of the vapor phase composition at equilibrium was carried out using headspace gas chromatography analysis. Multiple headspace extraction was used to calibrate the headspace gas chromatograph. Comparison of the experimental phase diagrams with phase diagrams from the literature shows good agreement. The composition of the azeotropes are reported, where they exist. The molar Gibbs energy of mixing is reported for all mixtures studied. The infinite dilution activity coefficients are reported for all components of all mixtures. Some thermodynamic models (those of Wilson, NRTL, UNIQUAC, and Flory-Scatchard) have been compared with regard to their suitability for modeling the experimental data.