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Principle of the Measurement
Chemical Ionization Mass Spectrometry (CIMS) using protonated acetone dimer ((C3H6O)H+(C3H6O)) ion chemistry
Species Measured
NH3
Time Response
1-5s depending on field project
Detection Limit
Precision on 1s data: 35 - 80 pptv (1 sigma) depending on field project
Accuracy
±(25% + (70-500 pptv)) depending on field project
Field Projects / Platforms
Key Publications
Nowak, J. B., J. A. Neuman, R. Bahreini, A. M. Middlebrook, J. S. Holloway, S. A. McKeen, D. D. Parrish, T. B. Ryerson, and M. Trainer, Ammonia sources in the California South Coast Air Basin and their impact on ammonium nitrate formation, Geophys. Res. Lett., doi:10.1029/2012GL051197, 2012.
Nowak, J. B., J. A. Neuman, R. Bahreini, C. A. Brock, A. M. Middlebrook, A. G. Wollny, J. S. Holloway, J. Peischl, T. B. Ryerson, and F. C. Fehsenfeld, Airborne observations of ammonia and ammonium nitrate formation over Houston, Texas, J. Geophys. Res., doi:10.1029/2010JD014195, 2010.
Nowak, J. B., J. A. Neuman, K. Kozai, L. G. Huey, D. J. Tanner, J. S. Holloway, T. B. Ryerson, G. J. Frost, S. A. McKeen, and F. C. Fehsenfeld, A chemical ionization mass spectrometry technique for airborne measurements of ammonia, J. Geophys. Res., doi:10.1029/2006JD007589, 2007.
Nowak, J. B., L. G. Huey, A. G. Russell, D. Tian, J. A. Neuman, D. Orsini, S. J. Sjostedt, A. P. Sullivan, D. J. Tanner, R. J. Weber, A. Nenes, E. Edgerton, F. C. Fehsenfeld, Analysis of urban gas phase ammonia measurements from the 2002 Atlanta Aerosol Nucleation and Real-Time Characterization Experiment (ANARChE), J. Geophys. Res., doi:10.1029/2006JD007113, 2006.
Neuman, J. A., T. B. Ryerson, L. G. Huey, R. Jakoubek, J. B. Nowak, C. Simons, and F. C. Fehsenfeld, Calibration and evaluation of nitric acid and ammonia permeation tubes by UV optical absorption, Environ. Sci. Technol., doi:10.1021/ES06422L, 2003.
