Repozitorij Univerze v Novi Gorici

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Naslov:Comparative Analysis of urban atmospheric aerosol by particle-induced X-ray emission (PIXE), proton elastic scattering analysis (PESA), and aerosol mass spectrometry (AMS)
Avtorji:Johnson, K.S. (Avtor)
Laskin, A. (Avtor)
Jimenez, Jose L. (Avtor)
Shutthanandan, V. (Avtor)
Molina, Luisa T. (Avtor)
Salcedo, Dara (Avtor)
Džepina, Katja (Avtor)
Molina, Mario J. (Avtor)
Datoteke:Gradivo nima datotek. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u. Povezava se odpre v novem oknu
Jezik:Angleški jezik
Vrsta gradiva:Neznano ()
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:A multifaceted approach to atmospheric aerosol analysis is often desirable infield studies where an understanding of technical comparability among different measurement techniques is essential. Herein, we report quantitative intercomparisons of particle-induced X-ray emission (PIXE) and proton elastic scattering analysis (PESA), performed offline under a vacuum, with analysis by aerosol mass spectrometry (AMS) carried out in real-time during the MCMA-2003 Field Campaign in the Mexico City Metropolitan Area. Good agreement was observed for mass concentrations of PIXE-measured sulfur (assuming it was dominated by SO42-) and AMS-measured sulfate during most of the campaign. PESA-measured hydrogen mass was separated into sulfate H and organic H mass fractions, assuming the only major contributions were (NH4)(2)SO4 and organic compounds. Comparison of the organic H mass with AMS organic aerosol measurements indicates that about 75% of the mass of these species evaporated under a vacuum. However similar to 25% of the organics does remain under a vacuum, which is only possible with low-vapor-pressure compounds, and which supports the presence of high-molecular-weight or highly oxidized organics consistent with atmospheric aging. Approximately 10% of the chloride detected by AMS was measured by PIXE, possibly in the form of metal-chloride complexes, while the majority of Cl was likely present as more volatile species including NH4Cl. This is the first comparison of PIXE/PESA and AMS and, to our knowledge, also the first report of PESA hydrogen measurements for urban organic aerosols.
Ključne besede:organic aerosols, secondary organic aerosols, Mexico City, MCMA-2003 field campaign
Leto izida:2008
Št. strani:str. 6619-6624
Številčenje:iss. 17, Vol. 42
COBISS_ID:59052035 Povezava se odpre v novem oknu
UDK:54
ISSN pri članku:0013-936X
URN:URN:SI:UNG:REP:6TEJUVYX
DOI:10.1021/es800393e Povezava se odpre v novem oknu
Število ogledov:488
Število prenosov:0
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
Področja:Gradivo ni uvrščeno v področja.
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Skupna ocena:(0 glasov)
Vaša ocena:Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.

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Gradivo je del revije

Naslov:Environmental science & technology
Skrajšan naslov:Environ. sci. technol.
Založnik:American Chemical Society
ISSN:0013-936X
COBISS.SI-ID:5141765 Novo okno

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