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Understanding Gas Phase Ion Chemistry Is the Key to Reliable Selected Ion Flow Tube-Mass Spectrometry Analyses
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SYSNO ASEP 0537005 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Understanding Gas Phase Ion Chemistry Is the Key to Reliable Selected Ion Flow Tube-Mass Spectrometry Analyses Author(s) Smith, D. (GB)
McEwan, M. J. (NZ)
Španěl, Patrik (UFCH-W) RID, ORCIDSource Title Analytical Chemistry. - : American Chemical Society - ISSN 0003-2700
Roč. 92, č. 19 (2020), s. 12750-12762Number of pages 13 s. Language eng - English Country US - United States Keywords ptr-tof-ms ; sift-ms ; humid air ; organic-compounds ; exhaled breath ; o-2(+) ions ; no+ ; h3o+ ; quantification ; series Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry Method of publishing Limited access Institutional support UFCH-W - RVO:61388955 UT WOS 000580426800003 EID SCOPUS 85091735404 DOI 10.1021/acs.analchem.0c03050 Annotation Ion-molecule reactions (IMR) are at the very core of trace gas analyses in modern chemical ionization (CI) mass spectrometer instruments, which are increasingly being used in diverse areas of research and industry. The focus of this Perspective is on the ion chemistry that underpins gas-phase analytical CI methods. Special attention is given to the soft chemical ionization method known as selected ion flow tube-mass spectrometry (SIFT-MS). The processes involved in the ion chemistry of the reagent cations, H3O+, NO+, and O-2(+center dot), and the anions, O-center dot, O-2(-center dot), OH-, and NO2-, are discussed in some detail. Stressed throughout is that an understanding of these processes is mandatory to obtain reliable analyses of humid gaseous media such as ambient air and exhaled breath. It is indicated that further research is needed to understand the consequences of replacing helium in some situations by the more readily available nitrogen as the carrier gas in SIFT-MS. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2021 Electronic address http://hdl.handle.net/11104/0314768
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