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Monolithische kohlenstoffhaltige Denuder als Erweiterung der personengetragenen GGP-Sammler zur Probenahme luftgetragener Dampf/Partikel-Gemische.

Monolithic carbonaceous denuders as an enhancement of portable personal GGP samplers for the collection of airborne vapour/particle mixtures.

Gefahrstoffe Reinhalt. Luft 79, 47-54 (2019)
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A more accurate assessment of the workers' exposure to aerosols from semi-volatile organic compounds (SVOC) can be achieved through the simultaneous and separate sampling of both SVOC aerosol phases. From a toxicological point of view, it is important to analyse the exact vapour/particle distribution of such aerosols, since in case of inhalation both aerosol phases show different deposition characteristics in the respiratory tract. The objective of this study was to examine the usability of extruded monolithic carbonaceous denuders as a possible enhancement of the GGP sampler. Our study showed a high transmission efficiency (>= 98%) for one denuder and 1 to 3 mu m polystyrene latex particles as well as for SVOC droplets at a flow rate of 5 l/min. Furthermore, high adsorption efficiencies of about 97 % could be observed for a flow rate of 5 l/min and two denuders. However, at a higher flow rate of 10 l/min n-hexadecane vapour was adsorbed with a higher efficiency than diethylene glycol vapour. No considerable evaporation of approximately 1 and 2 mu m n-hexadecane droplets could be determined. Consequently, the characterised denuder could be used for an effective vapour/particle-partitioning of aerosols from non-polar alkanes with droplet diameters of 1 to 3 mu m at flow rates around 5 l/min.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
ISSN (print) / ISBN 0949-8036
e-ISSN 1436-4891
Quellenangaben Band: 79, Heft: 3, Seiten: 47-54 Artikelnummer: , Supplement: ,
Verlag Springer
Begutachtungsstatus Peer reviewed