Simplified confirmation analysis for Carboxy-THC

von Mareck, Ute (Autor), ... Fußhöller, Gregor (Autor), Geyer, Hans (Autor), Thevis, Mario (Autor)
Erschienen in Recent advances in doping analysis (29) : Proceedings of the Manfred Donike Workshop ; 39th Cologne Workshop on Dope Analysis 22nd to 26th March 2021, Hellenthal: Sportverl. Strauß (Verlag), 2021, S. 163-166, Lit.

Results of confirmation procedures in the scope of the steroidal athlete biological passport in the Cologne laboratory from 2017-2019

von Mareck, Ute (Autor), ... Geyer, Hans (Autor), Fußhöller, Gregor (Autor), Haenelt, Nadine (Autor), Thevis, Mario (Autor)
Erschienen in Recent advances in doping analysis (29) : Proceedings of the Manfred Donike Workshop ; 39th Cologne Workshop on Dope Analysis 22nd to 26th March 2021, Hellenthal: Sportverl. Strauß (Verlag), 2021, S. 41-44, Lit.

Sensitive detection of testosterone and testosterone prohormone administrations based on urinary concentrations and carbon isotope ratios of androsterone and etiocholanolone

von Piper, Thomas (Autor), ... Haenelt, Nadine (Autor), Fußhöller, Gregor (Autor), Geyer, Hans (Autor), Thevis, Mario (Autor)
Erschienen in Recent advances in doping analysis (29) : Proceedings of the Manfred Donike Workshop ; 39th Cologne Workshop on Dope Analysis 22nd to 26th March 2021, Hellenthal: Sportverl. Strauß (Verlag), 2021, S. 187-188, Lit.

Sensitive detection of testosterone and testosterone prohormone administrations based on urinary concentrations and carbon isotope ratios of androsterone and etiocholanolone

von Piper, Thomas (Autor), ... Haenelt, Nadine (Autor), Fußhöller, Gregor (Autor), Geyer, Hans (Autor), Thevis, Mario (Autor)
Erschienen in Drug testing and analysis, 13 (2021), 11/12 (The 39th Manfred Donike workshop on doping analysis), S. 1835-1851, Lit.

Mass spectrometric characterization of urinary metabolites of the selective androgen receptor modulator andarine (S-4) for routine doping control purposes

von Thevis, Mario (Autor), ... Thomas, A. (Autor), Fußhöller, Gregor (Autor), Beuck, Simon (Autor), Geyer, Hans (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Rapid communications in mass spectrometry, 24 (2010), 15, S. 2245-2254, Lit.

GC -single and -triple quadrupole mass spectrometry in steroid profiling

von Mareck, Ute (Autor), ... Fußhöller, Gregor (Autor), Geyer, Hans (Autor), Opfermann, Georg (Autor), Thevis, Mario (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (20) : Proceedings of the Manfred-Donike-Workshop ; 30th Cologne Workshop on Dope Analysis ; 26th February to 2nd March 2012 2. Variante, Köln: Sportverl. Strauß (Verlag), 2012, S. 189-192, Lit.

Detecting the misuse of 7-oxo-DHEA by means of carbon isotope ratio mass spectrometry in doping control analysis

von Piper, Thomas (Autor), ... Fußhöller, Gregor (Autor), Geyer, Hans (Autor), Toboc, Ani (Autor), Mădălin-George, Dănilă (Autor), Thevis, Mario (Autor)
Erschienen in Rapid communications in mass spectrometry, 34 (2020), 12, Art.-ID e8776, [14 S.], Lit.

Additional investigations in connection with atypical findings for 19-norandrosterone : a case study

von Fußhöller, Gregor (Autor), ... Geyer, Hans (Autor), Haenelt, Nadine (Autor), Hülsemann, Frank (Autor), Gougoulidis, Vassilios (Autor), Blatt, Christina (Autor), Thevis, Mario (Autor)
Erschienen in Recent advances in doping analysis (29) : Proceedings of the Manfred Donike Workshop ; 39th Cologne Workshop on Dope Analysis 22nd to 26th March 2021, Hellenthal: Sportverl. Strauß (Verlag), 2021, S. 38-40, Lit.

Preliminary data on the potential for unintentional antidoping rule violations by permitted cannabidiol (CBD) use

von Mareck, Ute (Autor), ... Fußhöller, Gregor (Autor), Geyer, Hans (Autor), Huestis, Marilyn A. (Autor), Scheiff, Anja Brigitta (Autor), Thevis, Mario (Autor)
Erschienen in Drug testing and analysis, 13 (2021), 3, S. 539-549, Lit.

Detection of Δ6-methyltestosterone in a “dietary supplement” and GC–MS/MS investigations on its urinary metabolism

von Parr, Maria K. (Autor), ... Fußhöller, Gregor (Autor), Schlörer, Nils (Autor), Opfermann, Georg (Autor), Geyer, Hans (Autor), Rodchenkov, Grigory (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Toxicology letters, 201 (2011), 2, S. 101-104, Lit.

Mass spectrometric characterization of urinary hydrafinil metabolites for routine doping control purposes

von Knoop, André-Janic (Autor), ... Fußhöller, Gregor (Autor), Haenelt, Nadine (Autor), Görgens, Christian (Autor), Guddat, Sven (Autor), Geyer, Hans (Autor), Thevis, Mario (Autor)
Erschienen in Drug testing and analysis, 13 (2021), 11/12 (The 39th Manfred Donike workshop on doping analysis), S. 1915-1920, Lit.

Detection of stanozolol and its major metabolites in human urine by liquid chromatography-tandem mass spectrometry

von Thevis, Mario (Autor), ... Fußhöller, Gregor (Autor), Geyer, Hans (Autor), Rodchenkov, Grigory (Autor), Sigmund, Gerd (Autor), Koch, A. (Autor), Thomas, Andreas (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Chromatographia, 64 (2006), 7/8, S. 441-446, Lit.

Reporting and managing elevated testosterone/epitestosterone ratios : novel aspects after five years' experience

von Mareck, Ute (Autor), ... Geyer, Hans (Autor), Fußhöller, Gregor (Autor), Schwenke, Anne (Autor), Haenelt, Nadine (Autor), Piper, Thomas (Autor), Thevis, Mario (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Drug testing and analysis, 2 (2010), 11/12, S. 637-642, Lit.

The ratio 5aAdiol/E as indicator for the detection of testosterone doping in athletes with naturally low T/E : a case study

von Geyer, Hans (Autor), ... Fußhöller, Gregor (Autor), Haenelt, Nadine (Autor), Mareck, Ute (Autor), Blatt, Christina (Autor), Gougoulidis, Vassilios (Autor), Hülsemann, Frank (Autor), Piper, Thomas (Autor), Thevis, Mario (Autor)
Erschienen in Recent advances in doping analysis (28) : Proceedings of the Manfred Donike Workshop ; 38th Cologne Workshop on Dope Analysis 9th to 14th February 2020, Hellenthal: Sportverl. Strauß (Verlag), 2020, S. 90-93, Lit.

Determination of the origin of urinary norandrosterone traces by gas chromatography combustion isotope ratio mass spectrometry

von Hebestreit, Moritz (Autor), ... Flenker, Ulrich (Autor), Fußhöller, Gregor (Autor), Geyer, Hans (Autor), Güntner, Ute (Autor), Mareck, Ute (Autor), Piper, Thomas (Autor), Thevis, Mario (Autor), Ayotte, Christiane (Autor), Schänzer, Wilhelm (Autor)
Erschienen in The Analyst, 131 (2006), 9, S. 1021-1026, Lit.

Studies on the in vivo metabolism of the SARM YK11 : Identification and characterization of metabolites potentially useful for doping controls

von Piper, Thomas (Autor), ... Dib, Josef (Autor), Putz, Marlen Svenja (Autor), Fußhöller, Gregor (Autor), Pop, Valentin (Autor), Lagojda, Andreas (Autor), Kuehne, Dirk (Autor), Geyer, Hans (Autor), Schänzer, Wilhelm (Autor), Thevis, Mario (Autor)
Erschienen in Drug testing and analysis, 10 (2018), 11/12 (36th Cologne workshop: Advances in sports drug testing), S. 1646-1656, Lit.

Follow-up investigations of atypical passport findings for the ratio 5a-Androstane-3a,17b-diol/5b-Androstane-3a,17b-diol

von Haenelt, Nadine (Autor), ... Lourens, L. (Autor), Fußhöller, Gregor (Autor), Geyer, Hans (Autor), Goldmann, Linda (Autor), Schult, Claudia (Autor), Schwenke, Anne (Autor), Hülsemann, Frank (Autor), Gougoulidis, Vassilios (Autor), Blatt, Christina (Autor), Thevis, Mario (Autor)
Erschienen in Recent advances in doping analysis (29) : Proceedings of the Manfred Donike Workshop ; 39th Cologne Workshop on Dope Analysis 22nd to 26th March 2021, Hellenthal: Sportverl. Strauß (Verlag), 2021, S. 34-37, Lit.

Synthesis, characterization, and detection of new oxandrolone metabolites as long-term markers in sports drug testing

von Guddat, Sven (Autor), ... Fußhöller, Gregor (Autor), Beuck, Simon (Autor), Thomas, Andreas (Autor), Geyer, Hans (Autor), Rydevik, Axel (Autor), Bondesson, Ulf (Autor), Hedeland, Mikael (Autor), Lagojda, Andreas (Autor), Schänzer, Wilhelm (Autor), Thevis, Mario (Autor)
Erschienen in Analytical and bioanalytical chemistry, 405 (2013), 25, S. 8285-8294, Lit.