Chemische Charakterisierung und Spurenanalytik
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Erscheinungsjahr
- 2022 (2) (entfernen)
Dokumenttyp
- Posterpräsentation (2) (entfernen)
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- Englisch (2)
Referierte Publikation
- nein (2)
Schlagworte
- Analytical method (1)
- Cascade impactor (1)
- EN 16516 (1)
- ISO 16000-6 (1)
- Thermal extraction (1)
- UFP (1)
- VVOCs (1)
Organisationseinheit der BAM
- 4.2 Material-Mikrobiom Wechselwirkungen (2) (entfernen)
Several aspects were explored towards the standardization of a suitable procedure. The use of gaseous standards is necessary and a standard gas mixture containing 60 substances was successfully generated and employed for further investigations. The suitability of different chromatography columns was addressed: The use of PLOT (Porous Layer Open Tubular) columns is well suitable for VVOC analysis. The recoveries of the 60 analytes on several adsorbents and their combinations were determined: A combination of a graphitized carbon black and a carbon molecular sieve showed great results for all analytes. Carbon molecular sieves adsorb water which can impair the analysis. Different options such as purging, the use of a drying system or splitting were investigated for water removal. This contribution will present experimental results supporting the standardization of a method for VVOC analysis.
11 laser printers from 5 manufacturers were purchased in 2017 and tested for their UFP emissions. Size resolved sampling of the emitted particles was done with a 13 stage (30 nm to 10 µm) low pressure cascade impactor. The sampled particles were analysed for their chemical composition by thermal extraction (vaporization at 290°C) followed by GC-MS analysis. High boiling cyclic siloxanes (D10 to D16) were detected as constituents of UFP from laser printers. In comparison to measurements in 2008, aliphatic long-chain alkanes (C22 to C34) were detected additionally as chemical constituents of UFP from most of the tested printers and their amounts were higher than for cyclic siloxanes. Printers of one manufacturer showed very low UPF emissions compared to the other manufacturers.