Tropospheric Chemistry: Instruments

Nitric Acid (HNO₃) CIMS

decommissioned

Principle of the Measurement

Chemical Ionization Mass Spectrometry (CIMS) using I^- or SiF₅^- ion chemistry

Species Measured

HNO₃, HCOOH, HONO, Br₂, BrO, BrCl

Time Response

1 Second

Detection Limit

Precision on 1s HNO₃ data: 20 pptv (1 sigma)

Accuracy

±(20% + 40 pptv)

Field Projects / Platforms

• SOS 1999 (NOAA WP-3D)
• TexAQS 2000 (NCAR Electra)
• ITCT 2002 (NOAA WP-3D)
• NEAQS-ITCT 2004 (NOAA WP-3D)
• Mesa 2005 (ground site)
• TexAQS 2006 (NOAA WP-3D)
• ARCPAC 2008 (NOAA WP-3D) to measure halogens
• CalNex 2010 (NOAA WP-3D)
• SENEX 2013 (NOAA WP-3D)
• SONGNEX 2015 (NOAA WP-3D)

Key Publications

Neuman, J. A., M. Trainer, K. C. Aikin, W. M. Angevine, J. Brioude, S. S. Brown, J. A. de Gouw, W. P. Dubé, M. Graus, J. H. Flynn, J. S. Holloway, B. L. Lefer, P. Nedelec, J. B. Nowak, D. D. Parrish, I. B. Pollack, J. M. Roberts, T. B. Ryerson, H. Smit, V. Thouret, and N. L. Wagner, Observations of ozone transport from the free troposphere to the Los Angeles basin, J. Geophys. Res., doi:10.1029/2011JD016919, 2012.

Neuman, J. A., J. B. Nowak, L. G. Huey, J . B. Burkholder, J. E. Dibb, J. S. Holloway, J. Liao, J. Peischl, J. M. Roberts, T. B. Ryerson, E. Scheuer, H. Stark, R. E. Stickel, D. J. Tanner, and A. Weinheimer, Bromine measurements in ozone depleted air over the Arctic Ocean, Atmos. Chem. Phys., doi:10.5194/acp-10-6503-2010, 2010.

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.

Neuman, J. A., L. G. Huey, R. W. Dissly, F. C. Fehsenfeld, F. Flocke, J. C. Holecek, J. S. Holloway, G. Hübler, R. Jakoubek, D. K. Nicks Jr., D. D. Parrish, T.B. Ryerson, D. T. Sueper, and A. J. Weinheimer, Fast-response airborne in situ measurements of HNO3 during the Texas 2000 Air Quality Study, J. Geophys. Res., doi:10.1029/2001JD001437, 2002.