Use of a Versatile High Efficiency Multiparallel Denuder for the Sampling of PAHs in Ambient Air: Gas and Particle Phase Concentrations, Particle Size Distribution and Artifact Formation

The design and performance of a multiparallel plate denuder able to operate at low and high-flow (3–30 L/min) for the collection of polycyclic aromatic hydrocarbon (PAH) vapor is described. The denuder, in combination with a micro orifice uniform deposit impactor (MOUDI) was used to assess processes...

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Bibliographic Details
Published inEnvironmental science & technology Vol. 48; no. 1; pp. 499 - 507
Main Authors Delgado-Saborit, Juana Maria, Stark, Christopher, Harrison, Roy M
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 07.01.2014
Subjects
air
Air Pollutants - analysis
Analysis methods
Applied sciences
Atmospheric pollution
Efficiency
Environmental Monitoring - instrumentation
Environmental Monitoring - methods
Equipment Design
Exact sciences and technology
Gases
Gases - chemistry
Particle Size
particle size distribution
Particulate Matter - analysis
Pollution
Polycyclic aromatic hydrocarbons
Polycyclic Aromatic Hydrocarbons - analysis
Reproducibility of Results
Sampling
Specimen Handling
vapors
Volatile Organic Compounds - analysis
Hydrocarbon
Artefact
Polycyclic aromatic compound
Low volatile compound
Mutagen
Denuder
Persistent organic pollutant
Carcinogen
Particle size distribution
Sampler
Air pollution
Sampling
Organic compounds
Concentration distribution
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Summary:The design and performance of a multiparallel plate denuder able to operate at low and high-flow (3–30 L/min) for the collection of polycyclic aromatic hydrocarbon (PAH) vapor is described. The denuder, in combination with a micro orifice uniform deposit impactor (MOUDI) was used to assess processes of artifact formation in MOUDIs used with and without an upstream denuder. Duplicate sampling trains with an upstream denuder showed good repeatability of the measured gas and particle-phase concentrations and low breakthrough in the denuder (3.5–15%). The PAH size distributions within undenuded and denuded MOUDIs were studied. Use of the denuder altered the measured size distribution of PAHs toward smaller sizes, but both denuded and undenuded systems are subject to sampling artifacts.
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ISSN:0013-936X
1520-5851
1520-5851
DOI:10.1021/es402937d