Elemental ratio measurements of organic compounds  using aerosol mass spectrometry: characterization,  improved calibration, and implications

Canagaratna, M. R.; Jimenez, J. L.; Kroll, J. H.; Chen, Q.; Kessler, S. H.; Massoli, P.; Hildebrandt Ruiz, L.; Fortner, E.; Williams, L. R.; Wilson, K. R.; Surratt, J. D.; Donahue, N. M.; Jayne, J. T.; Worsnop, D. R.

doi:https://doi.org/10.5194/acp-15-253-2015

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.

https://doi.org/10.5194/acp-15-253-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 15, issue 1

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

M. R. Canagaratna, J. L. Jimenez, J. H. Kroll, Q. Chen, S. H. Kessler, P. Massoli, L. Hildebrandt Ruiz, E. Fortner, L. R. Williams, K. R. Wilson, J. D. Surratt, N. M. Donahue, J. T. Jayne, and D. R. Worsnop

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Preprint (discussion started on 31 Jul 2014)
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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC C6172: 'Review', Anonymous Referee #1, 25 Aug 2014
RC C7711: 'Review', Anonymous Referee #2, 05 Oct 2014
AC C9283: 'Author Responses to Reviews of ACP-2014-519', Manjula Canagaratna, 17 Nov 2014

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AR: Author's response | RR: Referee report | ED: Editor decision

AR by Manjula Canagaratna on behalf of the Authors (17 Nov 2014) Author's response Manuscript

ED: Publish as is (25 Nov 2014) by Nga Lee Ng

AR by Manjula Canagaratna on behalf of the Authors (25 Nov 2014) Manuscript

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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.