Source Apportionment of Urban Particulate Aliphatic and Polynuclear Aromatic Hydrocarbons (PAHs) Using Multivariate Methods

Samples of organic aerosol were collected in Santiago de Chile. An activated-charcoal diffusion denuder was used to strip out organic vapors prior to particle collection. Both polynuclear aromatic hydrocarbons (PAHs) and aliphatic hydrocarbons were determined using gas chromatography/mass spectromet...

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Bibliographic Details
Published in:Environmental science & technology 2001-06, Vol.35 (11), p.2288-2294
Main Authors: Kavouras, Ilias G, Koutrakis, Petros, Tsapakis, Manolis, Lagoudaki, Evaggelia, Stephanou, Euripides G, Von Baer, Dietrich, Oyola, Pedro
Format: Article
Language:English
Subjects:
Aerosols
Air Pollutants - analysis
Applied sciences
Atmospheric pollution
Chromatography
Cities
Exact sciences and technology
Gas Chromatography-Mass Spectrometry
Hydrocarbons
Hydrocarbons - analysis
Hydrocarbons - chemistry
Multivariate Analysis
Outdoor air quality
Particle Size
Pollution
Pollution sources. Measurement results
Polycyclic Aromatic Hydrocarbons - analysis
Polycyclic Aromatic Hydrocarbons - chemistry
Scientific imaging
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Summary:Samples of organic aerosol were collected in Santiago de Chile. An activated-charcoal diffusion denuder was used to strip out organic vapors prior to particle collection. Both polynuclear aromatic hydrocarbons (PAHs) and aliphatic hydrocarbons were determined using gas chromatography/mass spectrometry (GC/MS). Organic particle sources were resolved using both concentration diagnostic ratios and multivariate methods such as hierarchical cluster analysis (HCA) and factor analysis (FA). Four factors were identified based on the loadings of PAHs and n-alkanes and were attributed to the following sources:  (1) high-temperature combustion of fuels; (2) fugitive emissions from oil residues; (3) biogenic sources; and (4) unburned fuels. Multilinear regression (MLR) analysis was used to determine emission profiles and contributions of the sources. The reconstructed concentra tions of particle phase aliphatic and polynuclear aromatic hydrocarbons were in good agreement (R2 > 0.70) with those measured in Santiago de Chile.
ISSN:0013-936X
1520-5851
DOI:10.1021/es001540z