title: Application of FAIMS to anabolic androgenic steroids in sport drug testing.
abstract: Mass spectrometric identification of anabolic androgenic steroids challenges standard doping-control methods. To reveal a doping offence the presence of prohibited anabolic androgenic steroids at trace levels in the picogram-per-millilitre range must be confirmed as reliable. Human urine samples containing epitrenbolone, metandienone metabolite (17beta -hydroxymethyl-17alpha-methyl-18-norandrost-1,4,13-trien-3-one), stanozolol, 16beta-hydroxystanozolol and 4beta-hydroxystanozolol were analysed using LC-FAIMS-MS/MS. These substances are prohibited in sport according to World Anti-Doping Agency (WADA) regulations. Glucuronides were hydrolysed and prepared by liquid-liquid extraction. Excellent recovery and precision were obtained for all compounds. Linear calibration results for epitrenbolone and metandienone metabolite were obtained and concentration information could be determined in the ranges of reliable response between 750-1200 and 100-600 pg/mL, respectively. Limits of detection were estimated at 25 pg/mL (stanozolol), 50 pg/mL (metandienone metabolite, 16beta-hydroxystanozolol), 100 pg/mL (4beta-hydroxystanozolol) and 500 pg/mL (epitrenbolone). The assay was applied to doping-control samples. For all analytes, LC-FAIMS-MS/MS resulted in excellent interference removal, which effectively extends the post-dose detection time.
authors.affiliation: Institute of Biochemistry, German Sport University, Cologne, Germany. S.guddat@biochem.dshs-koeln.de
authors.forename: Sven
authors.initials: S
authors.lastname: Guddat
authors.forename: Mario
authors.initials: M
authors.lastname: Thevis
authors.forename: James
authors.initials: J
authors.lastname: Kapron
authors.forename: Andreas
authors.initials: A
authors.lastname: Thomas
authors.forename: Wilhelm
authors.initials: W
authors.lastname: Schänzer
mesh_terms: D045930:Anabolic Agents / Q000652:urine*; D000728:Androgens / Q000652:urine*; D004300:Doping in Sports; D006801:Humans; D015394:Molecular Structure; D013048:Specimen Handling / Q000379:methods; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D015813:Substance Abuse Detection / Q000379:methods*
chemical_list: D045930:Anabolic Agents; D000728:Androgens