title: High speed determination of beta-receptor blocking agents in human urine by liquid chromatography/tandem mass spectrometry.
abstract: Beta-receptor blocking agents are present on the international market in a huge variety. The International Olympic Committee prohibits the use of these drugs in several sport sections and doping control laboratories analyse urine samples of high-performance athletes with different techniques. Therefore, fast and reliable methods are required to enable a sensitive detection of many drugs and a high throughput of samples. In the present study a screening procedure is described using high speed liquid chromatography and multiple reaction monitoring to identify 32 beta-receptor blocking agents extracted from human urine. Urine specimens (blank urine samples, spiked urine samples and specimens of excretion studies) were hydrolysed, extracted and analysed within 7 min. Quasi-molecular ions (M(+) + H) of the beta-blockers are generated by means of an atmospheric pressure chemical ionization interface followed by collision-induced dissociation in a triple quadrupole mass spectrometer and subsequent detection of daughter ions. Proposals for the origin of common and individual secondary ions are presented.
authors.affiliation: Institute of Biochemistry, German Sport University Cologne, Carl-Diem-Weg 6, 50933 Cologne, Germany. mario@biochem.dshs-koeln.de
authors.forename: M
authors.initials: M
authors.lastname: Thevis
authors.forename: G
authors.initials: G
authors.lastname: Opfermann
authors.forename: W
authors.initials: W
authors.lastname: Schänzer
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000652:urine*; D002853:Chromatography, Liquid / Q000379:methods*; D006801:Humans; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D000319:Adrenergic beta-Antagonists