Articles | Volume 15, issue 6
https://doi.org/10.5194/acp-15-3429-2015
https://doi.org/10.5194/acp-15-3429-2015
Research article
 | 
28 Mar 2015
Research article |  | 28 Mar 2015

Total sulfate vs. sulfuric acid monomer concenterations in nucleation studies

K. Neitola, D. Brus, U. Makkonen, M. Sipilä, R. L. Mauldin III, N. Sarnela, T. Jokinen, H. Lihavainen, and M. Kulmala

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Cited articles

Arnold, F.: Ion-induced nucleation of atmospheric water vapor at the mesopause, Planet. Space Sci., 28, 1003–1009, https://doi.org/10.1016/0032-0633(80)90061-6, 1980.
Ayers, G. P., Gillett, R. W., and Gras, J. L.: On the vapor pressure of sulphuric acid, Geophys. Res. Lett., 7, 433–436, 1980.
Ball, S. M., Hanson, D. R., and Eisele, F. L.: Laboratory studies of particle nucleation: Initial results for H2SO4, H2O, and NH3 vapors, J. Geophys. Res., 104, 23709–23718, https://doi.org/10.1029/1999JD900411, 1999.
Benson, D., Young, L.-H., Kameel, F., and Lee, S.-H.: Laboratory-measured nucleation rates of sulfuric acid and water binary homogeneous nucleation from the SO2 + OH reaction, Geophys. Res. Lett., 35, L11801, https://doi.org/10.1029/2008GL033387, 2008.
Benson, D. R., Erupe, M. E., and Lee, S.-H.: Laboratory-measured H2SO4-H2O-NH3 ternary homogeneous nucleation rates: Initial observations, Geophys. Res. Lett., 36, L15818, https://doi.org/10.1029/2009GL038728, 2009.
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A discrepancy of 2 orders of magnitude was found between the measured sulfuric acid monomer concentration and total sulfate, when measured with independent methods (mass spectrometry and ion chromatography) with the same source of sulphuric acid vapor. The ion chromatography method produces the exact concentrations predicted by empirical equations, and the mass spectrometry method shows significantly lower values. The discrepancy is investigated thoroughly from different points of views.
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