title: A system for the quantitative determination of hydrocarbons in human breath.
abstract: A method for the analysis of hydrocarbons in exhaled human breath samples has been developed and its quantitative performance optimized and exhaustively validated. The method involves preconcentration on a solid absorbent at 0 degree C and desorption at 250 degrees C to a packed column gas chromatograph. Calibrations for ethane and pentane are reproducible and linear over the concentration ranges found in human breath samples. The technique is now available for study of conditions, such as cystic fibrosis, in which an oxidative stress component in tissue injury is suspected.
authors.affiliation: Department of Gastroenterology, Manchester Royal Infirmary, UK.
authors.forename: L
authors.initials: L
authors.lastname: Seabra
authors.forename: J M
authors.initials: JM
authors.lastname: Braganza
authors.forename: M F
authors.initials: MF
authors.lastname: Jones
mesh_terms: D001944:Breath Tests / Q000295:instrumentation*; D002849:Chromatography, Gas / Q000295:instrumentation; D004980:Ethane / Q000032:analysis*; D005260:Female; D006801:Humans; D008297:Male; D010420:Pentanes / Q000032:analysis*
chemical_list: D010420:Pentanes; C033353:pentane; D004980:Ethane