Zusammenfassung
Laboratory experiments have been performed to examine the potential of adsorptive enrichment thermal desorption and gas chromatography for the analysis of low molecular-weight oxygenated compounds in gaseous samples. The experiments were conducted with test atmospheres containing, for example, acetaldehyde, propionaldehyde, acrolein, methacrolein, and acetone. The suitability of the graphitized ...
Zusammenfassung
Laboratory experiments have been performed to examine the potential of adsorptive enrichment thermal desorption and gas chromatography for the analysis of low molecular-weight oxygenated compounds in gaseous samples. The experiments were conducted with test atmospheres containing, for example, acetaldehyde, propionaldehyde, acrolein, methacrolein, and acetone. The suitability of the graphitized carbon blacks Carbotrap X and Carbograph 5 for sampling these compounds was tested. In this context the influence of humidity on the recovery of the analytes and on the storage stability of the loaded adsorbent tubes over a period of seven days under different storage conditions was investigated. Losses of up to 60% propionaldehyde and acrolein were observed for Carbotrap X, even immediately after sampling. In contrast Carbograph 5 seems promising for the sampling of low molecular-weight oxygenated compounds, although with some limitations. The laboratory investigations were proved by use of an interlaboratory experiment.
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