Articles | Volume 15, issue 1
https://doi.org/10.5194/acp-15-253-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-15-253-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
12 Jan 2015
Research article |
| 12 Jan 2015
Elemental ratio measurements of organic compounds using aerosol mass spectrometry: characterization, improved calibration, and implications
Aerodyne Research, Inc., Billerica, MA, USA
J. L. Jimenez
Department of Chemistry and Biochemistry, and Cooperative Institute for Research in the Environmental Sciences (CIRES), University of Colorado, Boulder, CO, USA
J. H. Kroll
Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
S. H. Kessler
Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
P. Massoli
Aerodyne Research, Inc., Billerica, MA, USA
L. Hildebrandt Ruiz
McKetta Department of Chemical Engineering, and Center for Energy and Environmental Resources, The University of Texas at Austin, Austin, TX, USA
E. Fortner
Aerodyne Research, Inc., Billerica, MA, USA
L. R. Williams
Aerodyne Research, Inc., Billerica, MA, USA
K. R. Wilson
Lawrence Berkeley National Lab, Berkeley, CA, USA
J. D. Surratt
Department of Environmental Science and Engineering, University of North Carolina, Chapel Hill, NC, USA
N. M. Donahue
Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, USA
J. T. Jayne
Aerodyne Research, Inc., Billerica, MA, USA
D. R. Worsnop
Aerodyne Research, Inc., Billerica, MA, USA
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Latest update: 16 Nov 2025
Short summary
Atomic oxygen-to-carbon (O:C), hydrogen-to-carbon (H:C), and organic mass-to-organic carbon (OM:OC) ratios of ambient organic aerosol (OA) species provide key constraints for understanding their sources and impacts. Here an improved method for obtaining accurate O:C, H:C, and OM:OC with a widely used aerosol mass spectrometer is developed. These results imply that OA is more oxidized than previously estimated and indicate the need for new chemical mechanisms that simulate ambient oxidation.
Atomic oxygen-to-carbon (O:C), hydrogen-to-carbon (H:C), and organic mass-to-organic carbon...
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