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Measurement of iodine species and sulfuric acid using bromide chemical ionization mass spectrometers
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...
Autores principales: | , , , , , , , , , , , , , , , , , , |
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Lenguaje: | eng |
Publicado: |
2021
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.5194/amt-14-4187-2021 http://cds.cern.ch/record/2808731 |
_version_ | 1780973111977443328 |
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author | Wang, Mingyi He, Xu-Cheng Finkenzeller, Henning Iyer, Siddharth Chen, Dexian Shen, Jiali Simon, Mario Hofbauer, Victoria Kirkby, Jasper Curtius, Joachim Maier, Norbert Kurtén, Theo Worsnop, Douglas R Kulmala, Markku Rissanen, Matti Volkamer, Rainer Tham, Yee Jun Donahue, Neil M Sipilä, Mikko |
author_facet | Wang, Mingyi He, Xu-Cheng Finkenzeller, Henning Iyer, Siddharth Chen, Dexian Shen, Jiali Simon, Mario Hofbauer, Victoria Kirkby, Jasper Curtius, Joachim Maier, Norbert Kurtén, Theo Worsnop, Douglas R Kulmala, Markku Rissanen, Matti Volkamer, Rainer Tham, Yee Jun Donahue, Neil M Sipilä, Mikko |
author_sort | Wang, Mingyi |
collection | CERN |
description | 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 BrCIMS, 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-MIONCIMS 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 BrMION-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. |
id | cern-2808731 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2021 |
record_format | invenio |
spelling | cern-28087312022-11-01T21:13:30Zdoi:10.5194/amt-14-4187-2021http://cds.cern.ch/record/2808731engWang, MingyiHe, Xu-ChengFinkenzeller, HenningIyer, SiddharthChen, DexianShen, JialiSimon, MarioHofbauer, VictoriaKirkby, JasperCurtius, JoachimMaier, NorbertKurtén, TheoWorsnop, Douglas RKulmala, MarkkuRissanen, MattiVolkamer, RainerTham, Yee JunDonahue, Neil MSipilä, MikkoMeasurement of iodine species and sulfuric acid using bromide chemical ionization mass spectrometersAstrophysics and AstronomyIodine 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 BrCIMS, 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-MIONCIMS 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 BrMION-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.oai:cds.cern.ch:28087312021 |
spellingShingle | Astrophysics and Astronomy Wang, Mingyi He, Xu-Cheng Finkenzeller, Henning Iyer, Siddharth Chen, Dexian Shen, Jiali Simon, Mario Hofbauer, Victoria Kirkby, Jasper Curtius, Joachim Maier, Norbert Kurtén, Theo Worsnop, Douglas R Kulmala, Markku Rissanen, Matti Volkamer, Rainer Tham, Yee Jun Donahue, Neil M Sipilä, Mikko Measurement of iodine species and sulfuric acid using bromide chemical ionization mass spectrometers |
title | Measurement of iodine species and sulfuric acid using bromide chemical ionization mass spectrometers |
title_full | Measurement of iodine species and sulfuric acid using bromide chemical ionization mass spectrometers |
title_fullStr | Measurement of iodine species and sulfuric acid using bromide chemical ionization mass spectrometers |
title_full_unstemmed | Measurement of iodine species and sulfuric acid using bromide chemical ionization mass spectrometers |
title_short | Measurement of iodine species and sulfuric acid using bromide chemical ionization mass spectrometers |
title_sort | measurement of iodine species and sulfuric acid using bromide chemical ionization mass spectrometers |
topic | Astrophysics and Astronomy |
url | https://dx.doi.org/10.5194/amt-14-4187-2021 http://cds.cern.ch/record/2808731 |
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