Articles | Volume 15, issue 1
Atmos. Chem. Phys., 15, 253–272, 2015
Atmos. Chem. Phys., 15, 253–272, 2015

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 et al.


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

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
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.
Final-revised paper