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| Titel |
Mass closure on the chemical species in size-segregated atmospheric aerosol collected in an urban area of the Po Valley, Italy |
| VerfasserIn |
E. Matta, M. C. Facchini, S. Decesari, M. Mircea, F. Cavalli, S. Fuzzi, J.-P. Putaud, A. Dell’Acqua |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 3, no. 3 ; Nr. 3, no. 3 (2003-06-05), S.623-637 |
| Datensatznummer |
250001036
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| Publikation (Nr.) |
 copernicus.org/acp-3-623-2003.pdf |
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| Zusammenfassung |
| A complete size segregated chemical characterisation was carried out for aerosol samples
collected in the urban area of Bologna over a period of one year, using five-stage low pressure
Berner impactors. An original dual-substrate technique was adopted to obtain samples
suitable for a complete chemical characterisation. Total mass, inorganic, and organic
components were analysed as a function of size, and a detailed characterisation of the water
soluble organic compounds was also performed by means of a previously developed
methodology, based on HPLC separation of organic compounds according to their acid
character and functional group analysis by Proton Nuclear Magnetic Resonance. Chemical
mass closure of the collected samples was reached to within a few percent on average in the
submicron aerosol range, while a higher unknown fraction in the coarse aerosol range was
attributed to soil-derived species not analysed in this experiment. Comparison of the
functional group analysis results with model results simulating water soluble organic
compound production by gas-to-particle conversion of anthropogenic VOCs showed that this
pathway provides a minor contribution to the organic composition of the aerosol samples in
the urban area of Bologna. |
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