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| Titel |
Evaluation and application of a semi-continuous chemical characterization system for water soluble inorganic PM2.5 and associated precursor gases |
| VerfasserIn |
K. J. Godri, G. J. Evans, J. Slowik, A. Knox, J. Abbatt, J. Brook, T. Dann, E. Dabek-Zlotorzynska |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 2, no. 1 ; Nr. 2, no. 1 (2009-03-25), S.65-80 |
| Datensatznummer |
250000428
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| Publikation (Nr.) |
 copernicus.org/amt-2-65-2009.pdf |
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| Zusammenfassung |
| Water soluble inorganic particles components (Cl−, SO42−,
NO3−, and NH4+) and concentrations of their associated
precursor gases (HCl, SO2, HNO3, NH3) were semi-continuously
measured using the Dionex Gas Particle Ion Chromatography (GPIC) system.
Sampling was conducted adjacent to a high traffic street in downtown
Toronto, Canada from June 2006 to March 2007. This study evaluated the
precision and accuracy of field sampling measurements with the GPIC both
relative to filter based measurements and other co-located semi-continuous
instruments (R&P 8400N Nitrate Monitor, API Fluorescent SO2 Gas
Analyzer, and Aerodyne C-ToF-AMS). High temporal resolution PM2.5 mass
reconstruction is presented by combining GPIC measured inorganic species
concentrations and Sunset Laboratory OCEC Analyzer determined organics
concentrations. Field sampling results were also examined for seasonal and
diurnal variations. HNO3 and particulate nitrate exhibited diurnal
variation and strong partitioning to the gas phase was observed during the
summer. Ammonia and particulate ammonium also demonstrated seasonal
differences in their diurnal profiles. However, particulate sulphate and
SO2 showed no diurnal variation regardless of season suggesting
dominant transport from regional sources throughout the year. |
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