Quantification of methane in humid air and exhaled breath using selected ion flow tube mass spectrometry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F10%3A00355628" target="_blank" >RIV/61388955:_____/10:00355628 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Quantification of methane in humid air and exhaled breath using selected ion flow tube mass spectrometry

Popis výsledku v původním jazyce

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, H2Sand 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.

Název v anglickém jazyce

Quantification of methane in humid air and exhaled breath using selected ion flow tube mass spectrometry

Popis výsledku anglicky

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, H2Sand 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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Rapid Communications in Mass Spectrometry

ISSN

0951-4198

e-ISSN

—

Svazek periodika

24

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

—

Kód UT WoS článku

000277352700011

EID výsledku v databázi Scopus

—