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.

Evaluation of doping control samples to determine the prevalence of nicotine use by German elite athletes

von Rubio Alaejos, Ana (Autor), ... Sigmund, Gerd (Autor), Piper, Thomas (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. 167-170, Lit.

Carbon isotope ratios of endogenous steroids found in human serum : method development, validation, and reference population-derived thresholds

von Piper, Thomas (Autor), ... Geyer, Hans (Autor), Nieschlag, Eberhard (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. 185-186, Lit.

Black market products suspected to contain doping relevant ingredients - report for 2019-2020

von Krug, Oliver (Autor), ... Geyer, Hans (Autor), Thomas, Andreas (Autor), Walpurgis, Katja (Autor), Piper, Thomas (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. 122-127, 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.

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.

Prevalence of the imidazole derivatives naphazoline, oxymetazoline and xylometa-zoline in doping control samples

von Sigmund, Gerd (Autor), ... Geyer, Hans (Autor), Görgens, Christian (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. 28-31, Lit.

Peptide hormones

von Thomas, Andreas (Autor), ... Thevis, Mario (Autor)
Erschienen in Karch's drug abuse handbook, Boca Raton (Flor.): Routledge (Verlag), CRC Press (Verlag), 2022, S. 398-404, Lit.

Sports drug testing

von Thevis, Mario (Autor) ...
Erschienen in Karch's drug abuse handbook, Boca Raton (Flor.): Routledge (Verlag), CRC Press (Verlag), 2022, S. 367-436, Lit.

Can the ingestion of fruits from the Annonaceae family lead to the detection of higenamine in doping control urine samples?

von Rubio, Ana (Autor), ... Thomas, Alexander (Autor), Geyer, Hans (Autor), Euler, Luisa Sophie (Autor), Reis, G. (Autor), Costa-Padilha, M. (Autor), Pereira, H. M. G. (Autor), Cameron, L.C. (Autor), Thevis, Mario (Autor)
Erschienen in Recent advances in doping analysis (30) : Proceedings of the Manfred Donike Workshop ; 40th Cologne workshop on dope analysis ; 28th March to 1st April 2022, Hellenthal: Sportverl. Strauß (Verlag), 2022, S. 19-26, Lit.

Multi-analyte test methods in sport drug testing: challenges and solutions

von Görgens, Christian (Autor), ... Guddat, Sven (Autor), Thevis, Mario (Autor)
Erschienen in Karch's drug abuse handbook, Boca Raton (Flor.): Routledge (Verlag), CRC Press (Verlag), 2022, S. 414-419, Lit.

Gas-phase water adduct formation of IOX-2 in ion trap mass spectrometers

von Görgens, Christian (Autor), ... Guddat, Sven (Autor), Thevis, Mario (Autor)
Erschienen in Recent advances in doping analysis (30) : Proceedings of the Manfred Donike Workshop ; 40th Cologne workshop on dope analysis ; 28th March to 1st April 2022, Hellenthal: Sportverl. Strauß (Verlag), 2022, S. 147-151, Lit.

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.

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.

Risk of unintentional antidoping rule violations by consumption of hemp products

von Mareck, Ute (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. 128-132, 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.

Recent findings on 7-oxo-DHEA and its improved detection based on reference population-derived thresholds for 7β-OH-DHEA and 5αandrostane-3β,7β-diol-17-one

von Piper, Thomas (Autor), ... Geyer, Hans (Autor), Toboc, Ani (Autor), Ahrens, Brian (Autor), Pohanka, Anton (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. 45-49, Lit.

Preliminary data for ion mobility separation of recombinant and synthetic insulin ariants on a cyclic IMS mass spectrometer

von Thomas, Andreas (Autor), ... Fox, J. (Autor), Slade, S. (Autor), Kislyuk, S. (Autor), Gastall, H. (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. 96-100, Lit.

Identification and characterization of urinary isopropylnorsynephrine metabolites

von Krug, Oliver (Autor), ... Thomas, Andreas (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. 55-59, Lit.

Highly sensitive low resolution GCxGC-TOF as a complement in doping control analysis of anabolic androgenic steroids

von Piper, Thomas (Autor), ... Panto, S. (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. 50-54, Lit.