Measurement of iodine species and sulfuric acid using bromide chemical ionization mass spectrometers

M. Wang; M. Wang; X.-C. He; H. Finkenzeller; S. Iyer; D. Chen; D. Chen; J. Shen; M. Simon; V. Hofbauer; V. Hofbauer; J. Kirkby; J. Kirkby; J. Curtius; N. Maier; T. Kurtén; T. Kurtén; D. R. Worsnop; D. R. Worsnop; M. Kulmala; M. Kulmala; M. Kulmala; M. Kulmala; M. Rissanen; M. Rissanen; R. Volkamer; Y. J. Tham; Y. J. Tham; N. M. Donahue; N. M. Donahue; N. M. Donahue; N. M. Donahue; M. Sipilä

doi:10.5194/amt-14-4187-2021

Atmospheric Measurement Techniques (Jun 2021)

Measurement of iodine species and sulfuric acid using bromide chemical ionization mass spectrometers

M. Wang,
M. Wang,
X.-C. He,
H. Finkenzeller,
S. Iyer,
D. Chen,
D. Chen,
J. Shen,
M. Simon,
V. Hofbauer,
V. Hofbauer,
J. Kirkby,
J. Kirkby,
J. Curtius,
N. Maier,
T. Kurtén,
T. Kurtén,
D. R. Worsnop,
D. R. Worsnop,
M. Kulmala,
M. Kulmala,
M. Kulmala,
M. Kulmala,
M. Rissanen,
M. Rissanen,
R. Volkamer,
Y. J. Tham,
Y. J. Tham,
N. M. Donahue,
N. M. Donahue,
N. M. Donahue,
N. M. Donahue,
M. Sipilä

Affiliations

M. Wang: Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
M. Wang: Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
X.-C. He: Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, 00014 Helsinki, Finland
H. Finkenzeller: Department of Chemistry & CIRES, University of Colorado Boulder, Boulder, CO, 80309, USA
S. Iyer: Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, 00014 Helsinki, Finland
D. Chen: Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
D. Chen: Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
J. Shen: Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, 00014 Helsinki, Finland
M. Simon: Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
V. Hofbauer: Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
V. Hofbauer: Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
J. Kirkby: Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
J. Kirkby: CERN, the European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
J. Curtius: Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
N. Maier: Department of Chemistry, University of Helsinki, 00014 Helsinki, Finland
T. Kurtén: Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, 00014 Helsinki, Finland
T. Kurtén: Department of Chemistry, University of Helsinki, 00014 Helsinki, Finland
D. R. Worsnop: Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, 00014 Helsinki, Finland
D. R. Worsnop: Aerodyne Research, Inc., Billerica, MA, 01821, USA
M. Kulmala: Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, 00014 Helsinki, Finland
M. Kulmala: Helsinki Institute of Physics, P.O. Box 64 (Gustaf Hallstromin katu 2), 00014 University of Helsinki, Helsinki, Finland
M. Kulmala: Joint International Research Laboratory of Atmospheric and Earth System Sciences, Nanjing University, Nanjing, China
M. Kulmala: Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China
M. Rissanen: Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, 00014 Helsinki, Finland
M. Rissanen: Aerosol Physics Laboratory, Physics Unit, Faculty of Engineering and Natural Sciences, Tampere University, Tampere, Finland
R. Volkamer: Department of Chemistry & CIRES, University of Colorado Boulder, Boulder, CO, 80309, USA
Y. J. Tham: Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, 00014 Helsinki, Finland
Y. J. Tham: School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China
N. M. Donahue: Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
N. M. Donahue: Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
N. M. Donahue: Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
N. M. Donahue: Department of Engineering and Public Policy, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
M. Sipilä: Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, 00014 Helsinki, Finland

DOI: https://doi.org/10.5194/amt-14-4187-2021
Journal volume & issue: Vol. 14
pp. 4187 – 4202

Abstract

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Iodine species are important in the marine atmosphere for oxidation and new-particle formation. Understanding iodine chemistry and iodine new-particle formation requires high time resolution, high sensitivity, and simultaneous measurements of many iodine species. Here, we describe the application of a bromide chemical ionization mass spectrometer (Br-CIMS) to this task. During the iodine oxidation experiments in the Cosmics Leaving OUtdoor Droplets (CLOUD) chamber, we have measured gas-phase iodine species and sulfuric acid using two Br-CIMS, one coupled to a Multi-scheme chemical IONization inlet (Br-MION-CIMS) and the other to a Filter Inlet for Gasses and AEROsols inlet (Br-FIGAERO-CIMS). From offline calibrations and intercomparisons with other instruments, we have quantified the sensitivities of the Br-MION-CIMS to HOI, I2, and H2SO4 and obtained detection limits of 5.8 × 106, 3.8 × 105, and 2.0 × 105 molec. cm−3, respectively, for a 2 min integration time. From binding energy calculations, we estimate the detection limit for HIO3 to be 1.2 × 105 molec. cm−3, based on an assumption of maximum sensitivity. Detection limits in the Br-FIGAERO-CIMS are around 1 order of magnitude higher than those in the Br-MION-CIMS; for example, the detection limits for HOI and HIO3 are 3.3 × 107 and 5.1 × 106 molec. cm−3, respectively. Our comparisons of the performance of the MION inlet and the FIGAERO inlet show that bromide chemical ionization mass spectrometers using either atmospheric pressure or reduced pressure interfaces are well-matched to measuring iodine species and sulfuric acid in marine environments.

Published in Atmospheric Measurement Techniques

ISSN: 1867-1381 (Print); 1867-8548 (Online)
Publisher: Copernicus Publications
Country of publisher: Germany
LCC subjects: Technology: Engineering (General). Civil engineering (General): Environmental engineering; Technology: Engineering (General). Civil engineering (General): Earthwork. Foundations
Website: http://www.atmospheric-measurement-techniques.net/home.html

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