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AMT | Articles | Volume 11, issue 9
Atmos. Meas. Tech., 11, 5087–5104, 2018
https://doi.org/10.5194/amt-11-5087-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Meas. Tech., 11, 5087–5104, 2018
https://doi.org/10.5194/amt-11-5087-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 07 Sep 2018

Research article | 07 Sep 2018

Real-time measurements of gas-phase organic acids using SF6 chemical ionization mass spectrometry

Theodora Nah et al.

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Acree, W. and Chickos, J. S.: Phase Transition Enthalpy Measurements of Organic and Organometallic Compounds. Sublimation, Vaporization and Fusion Enthalpies From 1880 to 2010, J. Phys. Chem. Ref. Data, 39, 043101, https://doi.org/10.1063/1.3309507, 2010. 
Aljawhary, D., Lee, A. K. Y., and Abbatt, J. P. D.: High-resolution chemical ionization mass spectrometry (ToF-CIMS): application to study SOA composition and processing, Atmos. Meas. Tech., 6, 3211–3224, https://doi.org/10.5194/amt-6-3211-2013, 2013. 
Andreae, M. O., Talbot, R. W., Andreae, T. W., and Harriss, R. C.: Formic amd Acetic Acid over the Cental Amazon Region, Brazil. 1. Dry Season, J. Geophys. Res.-Atmos., 93, 1616–1624, https://doi.org/10.1029/JD093iD02p01616, 1988. 
Arnold, S. T. and Viggiano, A. A.: Turbulent ion flow tube study of the cluster-mediated reactions of SF6- with H2O, CH3OH, and C2H5OH from 50 to 500 torr, J. Phys. Chem. A, 105, 3527–3531, https://doi.org/10.1021/jp003967y, 2001. 
Baasandorj, M., Millet, D. B., Hu, L., Mitroo, D., and Williams, B. J.: Measuring acetic and formic acid by proton-transfer-reaction mass spectrometry: sensitivity, humidity dependence, and quantifying interferences, Atmos. Meas. Tech., 8, 1303–1321, https://doi.org/10.5194/amt-8-1303-2015, 2015. 
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Short summary
The sources and atmospheric chemistry of gas-phase organic acids are currently poorly understood, due in part to the limited range of measurement techniques available. We evaluated the use of SF6 as a sensitive and selective chemical ionization reagent ion for real-time measurements of gas-phase organic acids at a rural site in Yorkville, Georgia. We found that ambient concentrations of organic acids ranged from a few ppt to several ppb, and are dependent on ambient temperature.
The sources and atmospheric chemistry of gas-phase organic acids are currently poorly...
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