dc.contributor.author | Koss, Abigail R. | |
dc.contributor.author | Lim, Christopher Yung-Ta | |
dc.contributor.author | Rowe, James Clifford. | |
dc.contributor.author | Kroll, Jesse | |
dc.date.accessioned | 2020-06-03T18:51:32Z | |
dc.date.available | 2020-06-03T18:51:32Z | |
dc.date.issued | 2019-03 | |
dc.identifier.issn | 1867-8548 | |
dc.identifier.issn | 1867-1381 | |
dc.identifier.uri | https://hdl.handle.net/1721.1/125653 | |
dc.description.abstract | 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. | en_US |
dc.description.sponsorship | National Science Foundation (U.S.) (Award AGS-1638672) | en_US |
dc.language.iso | en | |
dc.publisher | Copernicus GmbH | en_US |
dc.relation.isversionof | https://dx.doi.org/10.5194/AMT-12-1861-2019 | en_US |
dc.rights | Creative Commons Attribution 4.0 International license | en_US |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_US |
dc.source | Copernicus Publications | en_US |
dc.title | Using collision-induced dissociation to constrain sensitivity of ammonia chemical ionization mass spectrometry (NH 4 + CIMS) to oxygenated volatile organic compounds | en_US |
dc.type | Article | en_US |
dc.identifier.citation | 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_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering | en_US |
dc.relation.journal | Atmospheric Measurement Techniques | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dc.date.updated | 2020-05-11T18:59:23Z | |
dspace.date.submission | 2020-05-11T18:59:25Z | |
mit.journal.volume | 12 | en_US |
mit.journal.issue | 3 | en_US |
mit.license | PUBLISHER_CC | |
mit.metadata.status | Complete | |