Universität zu Köln

Piper, Thomas ORCID: 0000-0002-7462-6693 and Thevis, Mario (2017). Applications of Isotope Ratio Mass Spectrometry in Sports Drug Testing Accounting for Isotope Fractionation in Analysis of Biological Samples. In: Methods in Enzymology, S. 403 - 433. SAN DIEGO: ELSEVIER ACADEMIC PRESS INC. ISBN 978-0-12-812273-0

Piper, Thomas ORCID: 0000-0002-7462-6693, Putz, Marlen, Delahaut, Philippe and Thevis, Mario (2017). Carbon isotope ratios of endogenous steroids in Belgian Blue and Holstein cattle: Method development, reference population studies and application to steroid misuse control. Rapid Commun. Mass Spectrom., 31 (21). S. 1793 - 1803. HOBOKEN: WILEY. ISSN 1097-0231

Mehling, Lena-Maria, Piper, Thomas ORCID: 0000-0002-7462-6693, Dib, Josef, Pedersen, Daniel Sejer ORCID: 0000-0003-3926-7047, Madea, Burkhard, Hess, Cornelius and Thevis, Mario (2017). Development and validation of a HPLC-QTOF-MS method for the determination of GHB-beta-O-glucuronide and GHB-4-sulfate in plasma and urine. Forensic Toxicol., 35 (1). S. 77 - 86. NEW YORK: SPRINGER. ISSN 1860-8973

Mehling, Lena-Maria, Piper, Thomas ORCID: 0000-0002-7462-6693, Spottke, Annika, Heidbreder, Anna, Young, Peter, Madea, Burkhard, Thevis, Mario and Hess, Cornelius (2017). GHB-O-beta-glucuronide in blood and urine is not a suitable tool for the extension of the detection window after GHB intake. Forensic Toxicol., 35 (2). S. 263 - 275. NEW YORK: SPRINGER. ISSN 1860-8973

Thevis, Mario, Piper, Thomas ORCID: 0000-0002-7462-6693, Dib, Josef, Lagojda, Andreas, Kuehne, Dirk, Packschies, Lars, Geyer, Hans and Schaenzer, Wilhelm (2017). Mass spectrometric characterization of the selective androgen receptor modulator (SARM) YK-11 for doping control purposes. Rapid Commun. Mass Spectrom., 31 (14). S. 1175 - 1184. HOBOKEN: WILEY. ISSN 1097-0231

Schaefer, Maximilian S., Piper, Thomas ORCID: 0000-0002-7462-6693, Geyer, Hans, Schneemann, Julia, Neukirchen, Martin, Thevis, Mario and Kienbaum, Peter (2017). Xenon elimination kinetics following brief exposure. Drug Test. Anal., 9 (5). S. 666 - 671. HOBOKEN: WILEY. ISSN 1942-7611

Vogel, Matthias, Dib, Josef, Tretzel, Laura, Piper, Thomas ORCID: 0000-0002-7462-6693, Thomas, Andreas ORCID: 0000-0003-1199-0743, Schaenzer, Wilhelm and Thevis, Mario (2016). Analytics of nonpeptidic erythropoietin mimetic agents in sports drug testing employing high-resolution/high-accuracy liquid chromatography-mass spectrometry. Anal. Bioanal. Chem., 408 (23). S. 6431 - 6443. HEIDELBERG: SPRINGER HEIDELBERG. ISSN 1618-2650

Tretzel, Laura, Thomas, Andreas ORCID: 0000-0003-1199-0743, Piper, Thomas ORCID: 0000-0002-7462-6693, Hedeland, Mikael ORCID: 0000-0001-8962-2815, Geyer, Hans, Schaenzer, Wilhelm and Thevis, Mario (2016). Fully automated determination of nicotine and its major metabolites in whole blood by means of a DBS online-SPE LC-HR-MS/MS approach for sports drug testing. J. Pharm. Biomed. Anal., 123. S. 132 - 141. AMSTERDAM: ELSEVIER SCIENCE BV. ISSN 1873-264X

Casilli, Alessandro, Piper, Thomas ORCID: 0000-0002-7462-6693, de Oliveira, Fabio Azamor, Padilha, Monica Costa, Pereira, Henrique Marcelo, Thevis, Mario and de Aquino Neto, Francisco Radler (2016). Optimization of an online heart-cutting multidimensional gas chromatography cleanup step for isotopic ratio mass spectrometry and simultaneous quadrupole mass spectrometry measurements of endogenous anabolic steroid in urine. Drug Test. Anal., 8 (11-12). S. 1204 - 1212. HOBOKEN: WILEY. ISSN 1942-7611

Piper, Thomas ORCID: 0000-0002-7462-6693, Schaenzer, Wilhelm and Thevis, Mario (2016). Revisiting the metabolism of 19-nortestosterone using isotope ratio and high resolution/high accuracy mass spectrometry. J. Steroid Biochem. Mol. Biol., 162. S. 80 - 92. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 0960-0760

Sigmund, Gerd, Dib, Josef, Tretzel, Laura, Piper, Thomas ORCID: 0000-0002-7462-6693, Bosse, Christina, Schaenzer, Wilhelm and Thevis, Mario (2015). Monitoring 2-phenylethanamine and 2-(3-hydroxyphenyl)acetamide sulfate in doping controls. Drug Test. Anal., 7 (11-12). S. 1057 - 1063. HOBOKEN: WILEY-BLACKWELL. ISSN 1942-7611

Thevis, Mario, Piper, Thomas ORCID: 0000-0002-7462-6693, Geyer, Hans, Schaefer, Maximilian S., Schneemann, Julia, Kienbaum, Peter ORCID: 0000-0002-0655-9177 and Schaenzer, Wilhelm (2015). Urine analysis concerning xenon for doping control purposes. Rapid Commun. Mass Spectrom., 29 (1). S. 61 - 67. HOBOKEN: WILEY-BLACKWELL. ISSN 1097-0231

Zhang, Lijun, Thevis, Mario, Piper, Thomas ORCID: 0000-0002-7462-6693, Jochmann, Maik A., Wolbert, J. Benjamin, Kujawinski, Dorothea M., Wiese, Steffen, Teutenberg, Thorsten and Schmidt, Torsten C. (2014). Carbon Isotope Ratio Analysis of Steroids by High-Temperature Liquid Chromatography-Isotope Ratio Mass Spectrometry. Anal. Chem., 86 (5). S. 2297 - 2303. WASHINGTON: AMER CHEMICAL SOC. ISSN 1520-6882

Piper, Thomas ORCID: 0000-0002-7462-6693, Thomas, Andreas ORCID: 0000-0003-1199-0743, Baume, Norbert, Sobolevsky, Timothy, Saugy, Martial, Rodchenkov, Grigory, Schaenzer, Wilhelm and Thevis, Mario (2014). Determination of 13C/12C ratios of endogenous urinary 5-amino-imidazole-4-carboxamide 1-D-ribofuranoside (AICAR). Rapid Commun. Mass Spectrom., 28 (11). S. 1194 - 1203. HOBOKEN: WILEY-BLACKWELL. ISSN 1097-0231

Krug, Oliver, Thomas, Andreas ORCID: 0000-0003-1199-0743, Walpurgis, Katja, Piper, Thomas ORCID: 0000-0002-7462-6693, Sigmund, Gerd, Schaenzer, Wilhelm, Laussmann, Tim ORCID: 0000-0002-0180-3513 and Thevis, Mario (2014). Identification of black market products and potential doping agents in Germany 2010-2013. Eur. J. Clin. Pharmacol., 70 (11). S. 1303 - 1312. HEIDELBERG: SPRINGER HEIDELBERG. ISSN 1432-1041

Thevis, Mario, Thomas, Andreas ORCID: 0000-0003-1199-0743, Piper, Thomas ORCID: 0000-0002-7462-6693, Krug, Oliver, Delahaut, Philippe and Schaenzer, Wilhelm (2014). Liquid chromatography-high resolution/high accuracy (tandem) mass spectrometry-based identification of in vivo generated metabolites of the selective androgen receptor modulator ACP-105 for doping control purposes. Eur. J. Mass Spectrom., 20 (1). S. 73 - 84. LONDON: SAGE PUBLICATIONS LTD. ISSN 1751-6838

Thevis, Mario, Piper, Thomas ORCID: 0000-0002-7462-6693, Geyer, Hans, Thomas, Andreas ORCID: 0000-0003-1199-0743, Schaefer, Maximilian S., Kienbaum, Peter ORCID: 0000-0002-0655-9177 and Schaenzer, Wilhelm (2014). Measuring xenon in human plasma and blood by gas chromatography/mass spectrometry. Rapid Commun. Mass Spectrom., 28 (13). S. 1501 - 1507. HOBOKEN: WILEY-BLACKWELL. ISSN 1097-0231

Krug, Oliver, Kutscher, Daniel, Piper, Thomas ORCID: 0000-0002-7462-6693, Geyer, Hans, Schaenzer, Wilhelm and Thevis, Mario (2014). Quantifying cobalt in doping control urine samples - a pilot study. Drug Test. Anal., 6 (11-12). S. 1186 - 1191. HOBOKEN: WILEY-BLACKWELL. ISSN 1942-7611

Thevis, Mario, Piper, Thomas ORCID: 0000-0002-7462-6693, Horning, Stevan, Juchelka, Dieter and Schaenzer, Wilhelm (2013). Hydrogen isotope ratio mass spectrometry and high-resolution/high-accuracy mass spectrometry in metabolite identification studies: Detecting target compounds for sports drug testing. Rapid Commun. Mass Spectrom., 27 (17). S. 1904 - 1913. HOBOKEN: WILEY-BLACKWELL. ISSN 0951-4198

Thomas, Andreas ORCID: 0000-0003-1199-0743, Vogel, Matthias, Piper, Thomas ORCID: 0000-0002-7462-6693, Krug, Oliver, Beuck, Simon, Schanzer, Wilhelm and Thevis, Mario (2013). Quantification of AICAR-ribotide concentrations in red blood cells by means of LC-MS/MS. Anal. Bioanal. Chem., 405 (30). S. 9703 - 9710. HEIDELBERG: SPRINGER HEIDELBERG. ISSN 1618-2650

Piper, Thomas ORCID: 0000-0002-7462-6693, Geyer, Hans and Schaenzer, Wilhelm (2010). Degradation of urine samples and its influence on the C-13/C-12 ratios of excreted steroids. Drug Test. Anal., 2 (11-12). S. 620 - 630. HOBOKEN: WILEY. ISSN 1942-7611

Piper, Thomas ORCID: 0000-0002-7462-6693, Opfermann, Georg, Thevis, Mario and Schaenzer, Wilhelm (2010). Determination of C-13/C-12 ratios of endogenous urinary steroids excreted as sulpho conjugates. Rapid Commun. Mass Spectrom., 24 (21). S. 3171 - 3182. MALDEN: WILEY-BLACKWELL. ISSN 0951-4198

Mareck, Ute, Geyer, Hans, Fusshoeller, Gregor, Schwenke, Anne, Haenelt, Nadine, Piper, Thomas ORCID: 0000-0002-7462-6693, Thevis, Mario and Schaenzer, Wilhelm (2010). Reporting and managing elevated testosterone/epitestosterone ratios - Novel aspects after five years' experience. Drug Test. Anal., 2 (11-12). S. 637 - 643. MALDEN: WILEY-BLACKWELL. ISSN 1942-7603