Počet záznamů: 1
Quantification of methane in humid air and exhaled breath using selected ion flow tube mass spectrometry
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SYSNO ASEP 0355628 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Quantification of methane in humid air and exhaled breath using selected ion flow tube mass spectrometry Tvůrce(i) Dryahina, Kseniya (UFCH-W) RID, ORCID
Smith, D. (GB)
Španěl, Patrik (UFCH-W) RID, ORCIDZdroj.dok. Rapid Communications in Mass Spectrometry. - : Wiley - ISSN 0951-4198
Roč. 24, č. 9 (2010), s. 1296-1304Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova mass spectrometry ; SIFT-MS ; breath Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP GP203/09/P172 GA ČR - Grantová agentura ČR GA202/09/0800 GA ČR - Grantová agentura ČR CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000277352700011 DOI 10.1002/rcm.4513 Anotace In selected ion flow tube mass spectrometry, SIFT-MS, analyses of humid air and breath, it is essential to consider and account for the influence of water vapour in the media, which can be profound for the analysis of some compounds, including H2CO, H2S and notably CO2. To date, the analysis of methane has not been considered, since it is known to be unreactive with H3O+ and NO+, the most important precursor ions for SIFT-MS analyses, and it reacts only slowly with the other available precursor ion, O-2(+). However, we have now experimentally investigated methane analysis and report that it can be quantified in both air and exhaled breath by exploiting the slow O-2(+)/PCH4 reaction that produces CH3O2+ ions. We show that the ion chemistry is significantly influenced by the presence of water vapour in the sample, which must be quantified if accurate analyses are to be performed. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2011
Počet záznamů: 1