title: Detection of 13C labelled compounds by gas chromatography coupled to atomic emission detection--application to caffeine metabolites.
abstract: This paper illustrates the use of gas chromatography coupled to atomic emission detection (GC-AED) and of the stable isotope tracer 13C for the determination of drug metabolites. After administration of a parent drug labelled with 13C and extraction of the metabolites from the biological fluids, a 13C chromatographic profile is determined using the specific detection of the 13C atomic emission and subtraction of the 13C natural abundance. Thus, only the compounds which are metabolites with a 13C enrichment over the natural abundance are detected. [1,3,7 trimethyl-13C3]xanthine which is extensively metabolized by the liver is used as an example.
authors.affiliation: Laboratoire d'Etudes Analytiques et Cinétiques du Médicament-LEACM, Institute of Pharmaceutical and Biological Sciences, Lyon, France.
authors.forename: M S
authors.initials: MS
authors.lastname: Boukraa
authors.forename: D
authors.initials: D
authors.lastname: Deruaz
authors.forename: A
authors.initials: A
authors.lastname: Bannier
authors.forename: M
authors.initials: M
authors.lastname: Desage
authors.forename: J L
authors.initials: JL
authors.lastname: Brazier
mesh_terms: D002110:Caffeine / Q000031:analogs & derivatives / Q000032:analysis*; D002247:Carbon Isotopes; D002849:Chromatography, Gas / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry
chemical_list: D002247:Carbon Isotopes; D002110:Caffeine