Quantification of hydrogen cyanide in humid air by selected ion flow tube mass spectrometry
Jazyk angličtina Země Anglie, Velká Británie Médium print
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
15329882
DOI
10.1002/rcm.1566
Knihovny.cz E-zdroje
- MeSH
- dechové testy MeSH
- hmotnostní spektrometrie metody MeSH
- kinetika MeSH
- kyanovodík analýza metabolismus MeSH
- Pseudomonas metabolismus MeSH
- reprodukovatelnost výsledků MeSH
- vlhkost MeSH
- voda analýza MeSH
- vzduch analýza MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- kyanovodík MeSH
- voda MeSH
Following our recent observation that Pseudomonas bacteria in vitro emit hydrogen cyanide, we have found it necessary to investigate the ion chemistry of this compound and to extend the kinetics database for selected ion flow tube mass spectrometry (SIFT-MS) to allow the accurate quantification of HCN in moist air samples, including exhaled breath. Because of the proximity of the proton affinities of HCN and H2O molecules, the presence of water vapour can significantly distort HCN analysis in the presence of water vapour and a more sophisticated analytical procedure has to be developed. Thus, the reactions of H3O+(H2O)0,1,2,3 ions with HCN molecules have been studied in the presence of varying concentrations of water vapour, reactions on which SIFT-MS analysis of HCN relies. The results of these experiments have allowed an analytical procedure to be developed which has extended the kinetics database of SIFT-MS, such that HCN can now be quantified in humid air and in exhaled breath.
Citace poskytuje Crossref.org
Recent developments and applications of selected ion flow tube mass spectrometry (SIFT-MS)