title: Identification of 11-Nor-delta9-tetrahydrocannabinol-9-carboxylic acid in urine by ion trap GC-MS-MS in the context of doping analysis.
abstract: The purpose of this study is to develop a sensitive and specific alternative to current gas chromatography (GC)-mass spectrometry (MS) selected ion monitoring confirmation methods of 11-nor-delta9-tetrahydrocannabinol-9-carboxylic acid (cTHC) in human urine samples, in the context of doping analysis. An identification procedure based on the comparison, among suspicious and control samples, of the relative abundances of cTHC selected product ions obtained by GC-tandem MS in an ion trap is presented. The method complies with the identification criteria for qualitative assays established by sports authorities; the comparison procedure is precise, reproducible, specific, and sensitive, thus indicating that it is fit for the purpose of identification accordingly to World Antidoping Agency requirements.
authors.affiliation: Laboratorio de Control de Doping, Secretaria de Turismo y Deporte (Presidencia de la Nación), Crisólogo Larralde 1050, (1429) Buenos Aires, Argentina.
authors.forename: Gerardo M
authors.initials: GM
authors.lastname: Caballero
authors.forename: Carlos
authors.initials: C
authors.lastname: D'Angelo
authors.forename: Mariá Sol
authors.initials: MS
authors.lastname: Fraguío
authors.forename: Osvaldo Teme
authors.initials: OT
authors.lastname: Centurión
mesh_terms: D004300:Doping in Sports; D013759:Dronabinol / Q000031:analogs & derivatives* / Q000652:urine*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006801:Humans; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: C016780:11-nor-delta(9)-tetrahydrocannabinol-9-carboxylic acid; D013759:Dronabinol