Atmos. Chem. Phys. Discuss., 11, 23619-23653, 2011
www.atmos-chem-phys-discuss.net/11/23619/2011/
doi:10.5194/acpd-11-23619-2011
© Author(s) 2011. This work is distributed
under the Creative Commons Attribution 3.0 License.
Review Status
This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
Quantification of hydroxyacetone and glycolaldehyde using chemical ionization mass spectrometry
K. M. Spencer1, M. R. Beaver2, J. M. St. Clair2, J. D. Crounse2, F. Paulot3, and P. O. Wennberg2,3
1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
2Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA
3Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA

Abstract. Chemical ionization mass spectrometry (CIMS) enables online, fast, in situ detection and quantification of hydroxyacetone and glycolaldehyde. Two different CIMS approaches are demonstrated employing the strengths of single quadrupole mass spectrometry and triple quadrupole (tandem) mass spectrometry. Both methods are capable of the measurement of hydroxyacetone, an analyte with minimal isobaric interferences. Tandem mass spectrometry provides direct separation of the isobaric compounds glycolaldehyde and acetic acid using distinct, collision-induced dissociation daughter ions. Measurement of hydroxyacetone and glycolaldehyde by these methods was demonstrated during the ARCTAS-CARB 2008 campaign and the BEARPEX 2009 campaign. Enhancement ratios of these compounds in ambient biomass burning plumes are reported for the ARCTAS-CARB campaign. BEARPEX observations are compared to simple photochemical box model predictions of biogenic volatile organic compound oxidation at the site.

Citation: Spencer, K. M., Beaver, M. R., Clair, J. M. St., Crounse, J. D., Paulot, F., and Wennberg, P. O.: Quantification of hydroxyacetone and glycolaldehyde using chemical ionization mass spectrometry, Atmos. Chem. Phys. Discuss., 11, 23619-23653, doi:10.5194/acpd-11-23619-2011, 2011.
 
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