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A method for sampling air in animal houses to analyse trace gases including odorants with the gas chromatograph

Agriculture and Environment
Publication Date
DOI: 10.1016/0304-1131(77)90005-4


Abstract There exists at present no generally accepted procedure for sampling trace gases including malodours, especially in animal houses. Therefore it seems to be necessary to develop a sampling technique which insures valid sampling of trace gases. The described sampling procedure is based on the method of the temperature gradient tube packed with Tenax. The temperature gradient is built up by liquid nitrogen. In the laboratory the sample is expelled by heat desorption and nitrogen carrier gas from the tube into the deep cooled column and analysed in a gas chromatograph equipped with deep-temperature program. Using two detectors (FID, FPD) simultaneously we receive two different chromatograms. The chromatogram of the FID is considered as a “Fingerprint”. The FPD relates to the sulphur compounds. The aim is to find a relationship between the total area (or single peaks) of the FID-chromatogram and direct sensory evaluation and possibly a correlation between isolated peaks, especially of sulphur compounds, and the different forms of swine housing.

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