Comparative analysis of urban atmospheric aerosol by particle-induced X-ray emission (PIXE), proton elastic scattering analysis (PESA), and aerosol mass spectrometry (AMS)
Por:
Johnson K.S., Laskin A., Jimenez J.L., Shutthanandan V., Molina L.T., Salcedo D., Dzepina K., Molina M.J.
Publicada:
1 sep 2008
Resumen:
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 SO(4)(2-)) 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 (NH(4))(2)SO(4) 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 vac
Filiaciones:
Johnson K.S.:
Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
Finnegan, Henderson, Farabow, Garrett and Dunner, L.L.P., Washington, DC 20001, United States
Laskin A.:
William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, MSIN K8-88, P.O. Box 999, Richland, WA 99352, United States
Jimenez J.L.:
Department of Chemistry and Biochemistry, CIRES, University of Colorado, Boulder, CO 80309, United States
Shutthanandan V.:
William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, MSIN K8-88, P.O. Box 999, Richland, WA 99352, United States
Molina L.T.:
Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
Molina Center for Energy and the Environment, San Diego, CA 92037, United States
Salcedo D.:
Centre de Investigaciones Químicas, Universidad Autonoma del Estado de Morelos, Cuernvaca 62210, Mexico
Dzepina K.:
Department of Chemistry and Biochemistry, CIRES, University of Colorado, Boulder, CO 80309, United States
Molina M.J.:
Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
Department of Chemistry and Biochemistry, University of California - San Diego, San Diego, CA 92093, United States
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