Universität zu Köln

Journal Article

Andersson, Alexander ORCID: 0000-0001-6498-2603, Piper, Thomas, Ekstrom, Lena ORCID: 0000-0003-1053-2345, Hirschberg, Angelica Linden ORCID: 0000-0001-6481-6277 and Thevis, Mario (2023). Usefulness of serum androgen isotope ratio mass spectrometry (IRMS) to detect testosterone supplementation in women. Drug Test. Anal., 15 (4). S. 465 - 470. HOBOKEN: WILEY. ISSN 1942-7611

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

Dias, Katrin A., Lawley, Justin S., Gatterer, Hannes ORCID: 0000-0002-5084-2930, Howden, Erin J., Sarma, Satyam, Cornwell, William K., III, Hearon, Christopher M., Jr., Samels, Mitchel, Everding, Braden, Liang, Allan Shuo-Wen, Hendrix, Max, Piper, Thomas, Thevis, Mario, Bruick, Richard K. and Levine, Benjamin D. (2019). Effect of acute and chronic xenon inhalation on erythropoietin, hematological parameters, and athletic performance. J. Appl. Physiol., 127 (6). S. 1503 - 1511. BETHESDA: AMER PHYSIOLOGICAL SOC. ISSN 1522-1601

Dib, Josef, Tretzel, Laura, Piper, Thomas, Lagojda, Andreas, Kuehne, Dirk, Schaenzer, Wilhelm and Thevis, Mario (2017). Screening for adiponectin receptor agonists and their metabolites in urine and dried blood spots. Clin. Mass Spectrom., 6. S. 13 - 21. AMSTERDAM: ELSEVIER. ISSN 2213-8005

Huelsemann, Frank, Gougoulidis, Vassilios, Schertel, Thomas, Fusshoeller, Gregor, Flenker, Ulrich, Piper, Thomas and Thevis, Mario (2018). Case Study: Atypical delta C-13 values of urinary norandrosterone. Drug Test. Anal., 10 (11-12). S. 1728 - 1734. HOBOKEN: WILEY. ISSN 1942-7611

Krombholz, Sophia, Thomas, Andreas, Piper, Thomas, Lagojda, Andreas, Kuehne, Dirk and Thevis, Mario (2022). Urinary phenylethylamine metabolites as potential markers for sports drug testing purposes. Biomed. Chromatogr., 36 (2). HOBOKEN: WILEY. ISSN 1099-0801

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

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

Lawley, Justin S., Gatterer, Hannes ORCID: 0000-0002-5084-2930, Dias, Katrin A., Howden, Erin J., Sarma, Satyam, Cornwell, William K., III, Hearon, Christopher M., Jr., Samels, Mitchel, Everding, Braden, Bruick, Richard K., Hendrix, Max, Piper, Thomas, Thevis, Mario and Levine, Benjamin D. (2019). Safety, hemodynamic effects, and detection of acute xenon inhalation: rationale for banning xenon from sport. J. Appl. Physiol., 127 (6). S. 1511 - 1519. BETHESDA: AMER PHYSIOLOGICAL SOC. ISSN 1522-1601

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

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

Piper, Thomas, Fusshoeller, Gregor, Geyer, Hans, Toboc, Ani, Danila, Madalin-George and Thevis, Mario (2020). Detecting the misuse of 7-oxo-DHEA by means of carbon isotope ratio mass spectrometry in doping control analysis. Rapid Commun. Mass Spectrom., 34 (12). HOBOKEN: WILEY. ISSN 1097-0231

Piper, Thomas, Fusshoeller, Gregor, Schaenzer, Wilhelm and Thevis, Mario (2022). Investigations on the in vivo metabolism of 5 alpha-androst-2-en-17-one. Rapid Commun. Mass Spectrom., 36 (17). HOBOKEN: WILEY. ISSN 1097-0231

Piper, Thomas, Geyer, Hans, Haenelt, Nadine, Huelsemann, Frank, Schaenzer, Wilhelm and Thevis, Mario (2021). Current Insights into the Steroidal Module of the Athlete Biological Passport. Int. J. Sports Med., 42 (10). S. 863 - 879. STUTTGART: GEORG THIEME VERLAG KG. ISSN 1439-3964

Piper, Thomas, Geyer, Hans, Nieschlag, Eberhard, Bally, Lia and Thevis, Mario (2021). Carbon isotope ratios of endogenous steroids found in human serum-method development, validation, and reference population-derived thresholds. Anal. Bioanal. Chem., 413 (22). S. 5655 - 5668. 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, Haenelt, Nadine, Fusshoeller, Gregor, Geyer, Hans and Thevis, Mario (2021). Sensitive detection of testosterone and testosterone prohormone administrations based on urinary concentrations and carbon isotope ratios of androsterone and etiocholanolone. Drug Test. Anal., 13 (11-12). S. 1835 - 1852. 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

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

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

Piper, Thomas and Thevis, Mario (2022). Addressing recent challenges in isotope ratio mass spectrometry: Development of a method applicable to 1-androstene-steroids, 6 alpha-hydroxy-androstenedione, and androstatrienedione. Drug Test. Anal., 14 (11-12). S. 1891 - 1904. HOBOKEN: WILEY. ISSN 1942-7611

Piper, Thomas and Thevis, Mario (2022). Investigations in carbon isotope ratios of seized testosterone and boldenone preparations. Drug Test. Anal., 14 (3). S. 514 - 519. HOBOKEN: WILEY. ISSN 1942-7611

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

Putz, Marlen, Piper, Thomas, Casilli, Alessandro, de Aquino Neto, Francisco Radler, Pigozzo, Fausto and Thevis, Mario (2018). Development and validation of a multidimensional gas chromatography/combustion/isotope ratio mass spectrometry-based test method for analyzing urinary steroids in doping controls. Anal. Chim. Acta, 1030. S. 105 - 115. AMSTERDAM: ELSEVIER SCIENCE BV. ISSN 1873-4324

Putz, Marlen, Piper, Thomas, Dubois, Michel, Delahaut, Philippe and Thevis, Mario (2019). Analysis of endogenous steroids in urine by means of multi-immunoaffinity chromatography and isotope ratio mass spectrometry for sports drug testing. Anal. Bioanal. Chem., 411 (28). S. 7563 - 7572. HEIDELBERG: SPRINGER HEIDELBERG. ISSN 1618-2650

Putz, Marlen, Piper, Thomas and Thevis, Mario (2020). Identification of Trenbolone Metabolites Using Hydrogen Isotope Ratio Mass Spectrometry and Liquid Chromatography/High Accuracy/High Resolution Mass Spectrometry for Doping Control Analysis. Front. Chem., 8. LAUSANNE: FRONTIERS MEDIA SA. ISSN 2296-2646

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

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

Sobolevsky, Tim ORCID: 0000-0002-0610-130X, Piper, Thomas, Ahrens, Brian and Thevis, Mario (2022). AICAr to SAICAr ratio can serve as additional marker of AICAr use. Drug Test. Anal., 14 (11-12). S. 2017 - 2026. HOBOKEN: WILEY. ISSN 1942-7611

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

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

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

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

Thevis, Mario, Piper, Thomas and Thomas, Andreas (2021). Recent advances in identifying and utilizing metabolites of selected doping agents in human sports drug testing. J. Pharm. Biomed. Anal., 205. AMSTERDAM: ELSEVIER. ISSN 1873-264X

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

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

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

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

Walpurgis, Katja, Piper, Thomas and Thevis, Mario (2022). Androgens, sports, and detection strategies for anabolic drug use. Best Pract. Res. Clin. Endoc. Metab., 36 (4). OXFORD: ELSEVIER SCI LTD. ISSN 1532-1908

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

de Oliveira, Fabio Azamor, Casilli, Alessandro, Piper, Thomas, da Silva, Thais Reis, da Silva, Cristiane Abrantes, Santana da Silva, Raquel Vieira, Dal Sasso, Marco Aurelio, dos Santos Goncalves Salgueiro, Gutierri Ricardo, Padilha, Monica Costa, Gualberto Pereira, Henrique Marcelo, Thevis, Mario and de Aquino Neto, Francisco Radler (2019). Implementation and Performance of the Gas Chromatography/Combustion/Isotope Ratio Mass Spectrometry-Based Method for the Confirmatory Analysis of Endogenous Anabolic Steroids during the Rio de Janeiro Olympic and Paralympic Games 2016. Anal. Chem., 91 (18). S. 11747 - 11757. WASHINGTON: AMER CHEMICAL SOC. ISSN 1520-6882

Book Section, Proceedings Item or annotation in a legal commentary

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