Characterization of Short-Term Particulate Matter Events by Real-Time Single Particle Mass Spectrometry
Autor: | Murray V. Johnston, Michael P. Tolocka, Derek A. Lake, Anthony S. Wexler, John M. Ondov, Melissa S. Reinard |
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Rok vydání: | 2006 |
Předmět: | |
Zdroj: | Aerosol Science and Technology. 40:873-882 |
ISSN: | 1521-7388 0278-6826 |
DOI: | 10.1080/02786820600714395 |
Popis: | Single particle measurements were made in Baltimore, Maryland from March to December 2002 using a real-time single particle mass spectrometer, RSMS-3. Particle composition classes were identified that indicated how the aerosol composition changed with time. The results were compared with collocated instruments giving particle number concentrations and size distributions, sulfate, nitrate, organic, and elemental carbon mass concentrations and total mass. Examination of these measurements revealed several particulate matter (PM) events in which the 24 h averaged PM 2.5 mass exceeded 30 μ g/m 3 . Three of these events were studied in further detail by comparing number and mass concentrations obtained by RSMS-3 with standard methods. For all three events, the number concentrations obtained with RSMS-3 and a scanning mobility particle sizer were highly correlated (R 2 ∼ 0.7). For the event characterized by a high sulfate mass concentration, the RSMS-3 provided an accurate measure of time-dependent nitrate and ... |
Databáze: | OpenAIRE |
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