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Breakthrough during air sampling with polyurethane foam: What do PUF 2/PUF 1 ratios mean?
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen. (EcoChange)
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen. (EcoChange)
2018 (engelsk)Inngår i: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 192, s. 267-271Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Frontal chromatography theory is applied to describe movement of gaseous semivolatile organic compounds (SVOCs) through a column of polyurethane foam (PUF). Collected mass fractions (FC) are predicted for sample volume/breakthrough volume ratios (τ = VS/VB) up to 6.0 and PUF bed theoretical plate numbers (N) from 2 to 16. The predictions assume constant air concentrations and temperatures. Extension of the calculations is done to relate the collection efficiency of a 2-PUF train (FC1+2) to the PUF 2/PUF 1 ratio. FC1+2 exceeds 0.9 for PUF 2/PUF 1 ≤ 0.5 and lengths of PUF commonly used in air samplers. As the PUF 2/PUF 1 ratio approaches unity, confidence in these predictions is limited by the analytical ability to distinguish residues on the two PUFs. Field data should not be arbitrarily discarded because some analytes broke through to the backup PUF trap. The fractional collection efficiencies can be used to estimate air concentrations from quantities retained on the PUF trap when sampling is not quantitative.

sted, utgiver, år, opplag, sider
Elsevier, 2018. Vol. 192, s. 267-271
Emneord [en]
Air sampling, Semivolatile organic compounds, Polyurethane foam, Frontal chromatography, Collection efficiency
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-141454DOI: 10.1016/j.chemosphere.2017.10.152ISI: 000418313900030PubMedID: 29107878OAI: oai:DiVA.org:umu-141454DiVA, id: diva2:1154828
Tilgjengelig fra: 2017-11-06 Laget: 2017-11-06 Sist oppdatert: 2018-06-09bibliografisk kontrollert

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