Collocated PM2.5 measurements using a conventional R&P TEOM (model 1400a) and a TEOM-FDMS were performed at a Paris urban background site during winter/summer field experiments. Results showed that conventional TEOM underestimates PM2.5 mass concentrations by about 50% in winter and 35% in summer. They also confirmed that this negative sampling artifact, due to the volatilization of semi-volatile material (SVM) inside the instrument, cannot be accurately accommodated by a single correction factor because of SVM routine fluctuations. A basic filter-based investigation of the SVM chemical composition also indicated that SVM, measured by the TEOM-FDMS, is mainly formed by ammonium nitrate in winter while significant contributions of semi-volatile organic matter were observed in summer. The latter species was found to possibly account for more than 50% of secondary organic aerosol formed during summer afternoons. These findings call for more investigation of the SVM chemical composition, particularly during the summer season, in Paris and in Europe. © 2007 Elsevier Ltd. All rights reserved.
CITATION STYLE
Favez, O., Cachier, H., Sciare, J., & Le Moullec, Y. (2007). Characterization and contribution to PM2.5 of semi-volatile aerosols in Paris (France). Atmospheric Environment, 41(36), 7969–7976. https://doi.org/10.1016/j.atmosenv.2007.09.031
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