Generation of volatile compounds on mouth exposure to urea and sucrose: implications for exhaled breath analysis
Language English Country Great Britain, England Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
16400196
DOI
10.1088/0967-3334/27/2/n01
PII: S0967-3334(06)08649-7
Knihovny.cz E-resources
- MeSH
- Ammonia analysis MeSH
- Breath Tests methods MeSH
- Ethanol analysis MeSH
- Humans MeSH
- Urea administration & dosage MeSH
- Sucrose administration & dosage MeSH
- Mouthwashes pharmacology MeSH
- Exhalation drug effects MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Ammonia MeSH
- Ethanol MeSH
- Urea MeSH
- Sucrose MeSH
- Mouthwashes MeSH
The increase in ammonia and ethanol in the exhaled breath stream following mouthwashes by aqueous solutions of urea and sugar (sucrose), respectively, has been investigated by analysing exhaled breath in real time using selected ion flow tube mass spectrometry, SIFT-MS. It is shown that the measured levels of these compounds in the stream of exhaled breath can be much greater than the endogenous levels originating at the alveolar boundary. Thus, it is concluded that without careful preparation, mouth production of these compounds, and other compounds as yet unidentified, can seriously compromise the quantification of truly endogenous trace compounds present in blood and in the alveolar breath, as required for clinical diagnosis, and can probably introduce additional compounds into the breath stream that could seriously mislead breath analysis. The concentrations of both the urea and sucrose solutions used to enhance the ammonia and ethanol levels were larger than normally present in food and drinks and so in most situations such severe enhancements will not occur.
References provided by Crossref.org
Recent developments and applications of selected ion flow tube mass spectrometry (SIFT-MS)