Principle of the Measurement
Chemical ionization mass spectrometric detection of gas phase organic and inorganic analytes via I- adduct formation
Species Measured
Reactive nitrogen species: HONO (nitrous acid), N2O5 (dinitrogen pentoxide), HNCO (isocyanic acid)
Halogen species: BrO, BrCl, BrCN, ClNO2, Cl2
Sulphur species: HPMTF (Hydroperoxy methyl thioformate)
Organic species: HCOOH (formic acid) and other low to intermediate volatility organics
Time Response
Instrumental response <1 sec, Field response is limited by inlet surface affinity for each compound
Detection Limit
Precision on 1s data various by species
Accuracy
(15% + 0.03 pptv) for N2O5
(15% + 0.05 pptv) for ClNO2
(30% + 15 pptv) for HONO
(20% + 5 pptv) for HNCO
(15% + 100 pptv) for HCOOH
(25% + 0.2 pptv) for halogenated species
Manufacturer
TOFWERK/Aerodyne Research Inc. (modified)
Field Projects
Key Publications
Robinson, M.A., J.M. Roberts, J.A. Neuman, C.M. Jernigan, L. Xu, M.M. Coggon, C.E. Stockwell, C. Warneke, J. Peischl, J.B. Gilman, A. Lamplugh, A.W. Rollins, K. Zuraski, J.C. Rivera-Rios, Y. Wang, N.L. Ng, S. Liu, S.S. Brown, and P.R. Veres, Online calibration of a chemical ionization mass spectrometer for multifunctional biogenic organic nitrates, ACS Environmental Science & Technology Air, doi:10.1021/acsestair.4c00056, 2024.
Robinson, M.A., J.A. Neuman, L.G. Huey, J.M. Roberts, S.S. Brown, and P.R. Veres, Temperature-dependent sensitivity of iodide chemical ionization mass spectrometers, Atmospheric Measurement Techniques, doi:10.5194/amt-15-4295-2022, 2022.
Veres, P.R., J.A. Neuman, T.H. Bertram, E. Assaf, G.M. Wolfe, C.J. Williamson, B. Weinzierl, S. Tilmes, C. Thompson, A.B. Thames, J.C. Schroder, A. Saiz-Lopez, A.W. Rollins, J.M. Roberts, D. Price, J. Peischl, B.A. Nault, K.H. Møller, D.O. Miller, S. Meinardi, Q. Li, J.-F. Lamarque, A. Kupc, H.G. Kjaergaard, D. Kinnison, J.L. Jimenez, C.M. Jernigan, R.S. Hornbrook, A. Hills, M. Dollner, D.A. Day, C.A. Cuevas, P. Campuzano-Jost, J. Burkholder, T.P. Bui, W.H. Brune, S.S. Brown, C.A. Brock, I. Bourgeois, D.R. Blake, E.C. Apel, and T.B. Ryerson, Global airborne sampling reveals a previously unobserved dimethyl sulfide oxidation mechanism in the marine atmosphere, Proceedings of the National Academy of Sciences, doi:10.1073/pnas.1919344117, 2020.
Veres, P. R., Roberts, J. M., Wild, R. J., Edwards, P. M., Brown, S. S., Bates, T. S., Quinn, P. K., Johnson, J. E., Zamora, R. J., and de Gouw, J., Peroxynitric acid (HO2NO2) measurements during the UBWOS 2013 and 2014 studies using iodide ion chemical ionization mass spectrometry, Atmos. Chem. Phys., doi:10.5194/acp-15-8101-2015, 2015.
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.