Using collision-induced dissociation to constrain sensitivity of ammonia chemical ionization mass spectrometry (NH 4 + CIMS) to oxygenated volatile organic compounds
Chemical ionization mass spectrometry (CIMS) instruments routinely detect hundreds of oxidized organic compounds in the atmosphere. A major limitation of these instruments is the uncertainty in their sensitivity to many of the detected ions. We describe the development of a new highresolution time-o...
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| Format: | Article |
| Language: | English |
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Copernicus GmbH
2020
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| Online Access: | https://hdl.handle.net/1721.1/125653 |
| _version_ | 1826191067539570688 |
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| author | Koss, Abigail R. Lim, Christopher Yung-Ta Rowe, James Clifford. Kroll, Jesse |
| author2 | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Koss, Abigail R. Lim, Christopher Yung-Ta Rowe, James Clifford. Kroll, Jesse |
| author_sort | Koss, Abigail R. |
| collection | MIT |
| description | Chemical ionization mass spectrometry (CIMS) instruments routinely detect hundreds of oxidized organic compounds in the atmosphere. A major limitation of these instruments is the uncertainty in their sensitivity to many of the detected ions. We describe the development of a new highresolution time-of-flight chemical ionization mass spectrometer that operates in one of two ionization modes: Using either ammonium ion ligand-switching reactions such as for NHC 4 CIMS or proton transfer reactions such as for protontransfer-reaction mass spectrometer (PTR-MS). Switching between the modes can be done within 2 min. The NH+4 CIMS mode of the new instrument has sensitivities of up to 67 000 dcps ppbv..1 (duty-cycle-corrected ion counts per second per part per billion by volume) and detection limits between 1 and 60 pptv at 2σ for a 1 s integration time for numerous oxygenated volatile organic compounds. We present a mass spectrometric voltage scanning procedure based on collision-induced dissociation that allows us to determine the stability of ammonium-organic ions detected by the NH+4 CIMS instrument. Using this procedure, we can effectively constrain the sensitivity of the ammonia chemical ionization mass spectrometer to a wide range of detected oxidized volatile organic compounds for which no calibration standards exist. We demonstrate the application of this procedure by quantifying the composition of secondary organic aerosols in a series of laboratory experiments. |
| first_indexed | 2024-09-23T08:49:59Z |
| format | Article |
| id | mit-1721.1/125653 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:49:59Z |
| publishDate | 2020 |
| publisher | Copernicus GmbH |
| record_format | dspace |
| spelling | mit-1721.1/1256532022-09-30T11:35:23Z Using collision-induced dissociation to constrain sensitivity of ammonia chemical ionization mass spectrometry (NH 4 + CIMS) to oxygenated volatile organic compounds Koss, Abigail R. Lim, Christopher Yung-Ta Rowe, James Clifford. Kroll, Jesse Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Chemical ionization mass spectrometry (CIMS) instruments routinely detect hundreds of oxidized organic compounds in the atmosphere. A major limitation of these instruments is the uncertainty in their sensitivity to many of the detected ions. We describe the development of a new highresolution time-of-flight chemical ionization mass spectrometer that operates in one of two ionization modes: Using either ammonium ion ligand-switching reactions such as for NHC 4 CIMS or proton transfer reactions such as for protontransfer-reaction mass spectrometer (PTR-MS). Switching between the modes can be done within 2 min. The NH+4 CIMS mode of the new instrument has sensitivities of up to 67 000 dcps ppbv..1 (duty-cycle-corrected ion counts per second per part per billion by volume) and detection limits between 1 and 60 pptv at 2σ for a 1 s integration time for numerous oxygenated volatile organic compounds. We present a mass spectrometric voltage scanning procedure based on collision-induced dissociation that allows us to determine the stability of ammonium-organic ions detected by the NH+4 CIMS instrument. Using this procedure, we can effectively constrain the sensitivity of the ammonia chemical ionization mass spectrometer to a wide range of detected oxidized volatile organic compounds for which no calibration standards exist. We demonstrate the application of this procedure by quantifying the composition of secondary organic aerosols in a series of laboratory experiments. National Science Foundation (U.S.) (Award AGS-1638672) 2020-06-03T18:51:32Z 2020-06-03T18:51:32Z 2019-03 2020-05-11T18:59:23Z Article http://purl.org/eprint/type/JournalArticle 1867-8548 1867-1381 https://hdl.handle.net/1721.1/125653 Zaytsev, Alexander et al. “Using collision-induced dissociation to constrain sensitivity of ammonia chemical ionization mass spectrometry (NH 4 + CIMS) to oxygenated volatile organic compounds” Atmospheric Measurement Techniques, vol. 12, no. 3, 2019, pp. 1861-1870 © 2019 The Author(s) en https://dx.doi.org/10.5194/AMT-12-1861-2019 Atmospheric Measurement Techniques Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf Copernicus GmbH Copernicus Publications |
| spellingShingle | Koss, Abigail R. Lim, Christopher Yung-Ta Rowe, James Clifford. Kroll, Jesse Using collision-induced dissociation to constrain sensitivity of ammonia chemical ionization mass spectrometry (NH 4 + CIMS) to oxygenated volatile organic compounds |
| title | Using collision-induced dissociation to constrain sensitivity of ammonia chemical ionization mass spectrometry (NH 4 + CIMS) to oxygenated volatile organic compounds |
| title_full | Using collision-induced dissociation to constrain sensitivity of ammonia chemical ionization mass spectrometry (NH 4 + CIMS) to oxygenated volatile organic compounds |
| title_fullStr | Using collision-induced dissociation to constrain sensitivity of ammonia chemical ionization mass spectrometry (NH 4 + CIMS) to oxygenated volatile organic compounds |
| title_full_unstemmed | Using collision-induced dissociation to constrain sensitivity of ammonia chemical ionization mass spectrometry (NH 4 + CIMS) to oxygenated volatile organic compounds |
| title_short | Using collision-induced dissociation to constrain sensitivity of ammonia chemical ionization mass spectrometry (NH 4 + CIMS) to oxygenated volatile organic compounds |
| title_sort | using collision induced dissociation to constrain sensitivity of ammonia chemical ionization mass spectrometry nh 4 cims to oxygenated volatile organic compounds |
| url | https://hdl.handle.net/1721.1/125653 |
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