Addressing recent challenges in isotope ratio mass spectrometry: development of a method applicable to1-androstene-steroids, 6α-hydroxy-androstenedione, andandrostatrienedione

von Piper, Thomas (Autor), ... Thevis, Mario (Autor)
Erschienen in Drug testing and analysis, 14 (2022), 11-12, S. 1891–1903, Lit.

Investigations in carbon isotope ratios of seized testosterone and boldenone preparations

von Piper, Thomas (Autor), ... Thevis, Mario (Autor)
Erschienen in Drug testing and analysis, 14 (2022), 3 (Addressing the challenges in forensic drug chemistry II), S. 514-518, 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.

Recent advances in identifying and utilizing metabolites of selected doping agents in human sports drug testing

von Thevis, Mario (Autor), ... Piper, Thomas (Autor), Thomas, Andreas (Autor)
Erschienen in Journal of pharmaceutical and biomedical analysis, 2021, 205, Art.-ID 114312, [o.A.], Lit.

AICAr to SAICAr ratio can serve as additional marker of AICAr use

von Sobolevsky, Tim (Autor), ... Piper, Thomas (Autor), Ahrens, Brian (Autor), Thevis, Mario (Autor)
Erschienen in Drug testing and analysis, 14 (2022), 11-12, S. 2017-2025, 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), Bally, Lia (Autor), Thevis, Mario (Autor)
Erschienen in Analytical and bioanalytical chemistry, 413 (2021), 22 (Recent Trends in (Bio)Analytical Chemistry), S. 5655-5667, Lit.

Usefulness of serum androgen isotope ratio mass spectrometry (IRMS) to detect testosterone supplementation in women

von Andersson, Alexander (Autor), ... Piper, Thomas (Autor), Ekström, Lena (Autor), Linden Hirschberg, Angelica (Autor), Thevis, Mario (Autor)
Erschienen in Drug testing and analysis, 15 (2023), 4, S. 465-469, Lit.

Analysis of endogenous steroids in urine by means of multi-immunoaffinity chromatography and isotope ratio mass spectrometry for sports drug testing

von Putz, Marlen Svenja (Autor), ... Piper, Thomas (Autor), Dubois, Michael (Autor), Delahaut, Philippe (Autor), Thevis, Mario (Autor)
Erschienen in Analytical and bioanalytical chemistry, 10 (2019), S. 7563–7571, Lit.

Development and validation of a multidimensional gas chromatography/combustion/isotope ratio mass spectrometry-based test method for analyzing urinary steroids in doping controls

von Putz, Marlen Svenja (Autor), ... Piper, Thomas (Autor), Casilli, Alessandro (Autor), Radler de Aquino Neto, Francisco (Autor), Pigozzo, Fausto (Autor), Thevis, Mario (Autor)
Erschienen in Analytica chimica acta, 2018, 1030, S. 105-114, Lit.

Optimization of an online heart-cutting multidimensional gas chromatography clean-up step for isotopic ratio mass spectrometry and simultaneous quadrupole mass spectrometry measure...

von Casilli, Alessandro (Autor), ... Piper, Thomas (Autor), Azamor de Oliveira, Fábio (Autor), Padilha, Monica Costa (Autor), Pereira, Henrique Marcelo Gualberto (Autor), Thevis, Mario (Autor), Aquino Neto, Francisco Radler de (Autor)
Erschienen in Drug testing and analysis, 8 (2016), 11/12 (34th Cologne workshop: Advances in sports drug testing), S. 1204-1211, Lit.

Safety, hemodynamic effects, and detection of acute xenon inhalation : rationale for banning xenon from sport

von Lawley, Justin S. (Autor), ... Gatterer, Hannes (Autor), Dias, Katrin A. (Autor), Howden, Erin J. (Autor), Sarma, Satyam (Autor), Cornwell, William K. (Autor), Hearon, Christopher M. (Autor), Samels, Mitchel (Autor), Everding, Braden (Autor), Bruick, Richard K. (Autor), Hendrix, Max (Autor), Piper, Thomas (Autor), Thevis, Mario (Autor), Levine, Benjamin D. (Autor)
Erschienen in Journal of applied physiology, 127 (2019), 6, S. 1511-1518, Lit.

Effect of acute and chronic xenon inhalation on erythropoietin, hematological parameters, and athletic performance

von Dias, Katrin A. (Autor), ... Lawley, Justin S. (Autor), Gatterer, Hannes (Autor), Howden, Erin J. (Autor), Sarma, Satyam (Autor), Cornwell, William K. (Autor), Hearon, Christopher M. (Autor), Samels, Mitchel (Autor), Everding, Braden (Autor), Liang, Allan Shuo-Wen (Autor), Hendrix, Max (Autor), Piper, Thomas (Autor), Thevis, Mario (Autor), Bruick, Richard K. (Autor), Levine, Benjamin D. (Autor)
Erschienen in Journal of applied physiology, 127 (2019), 6, S. 1503-1510, Lit.

Implementation and performance of the gas chromatography/combustion/isotope ratio mass spectrometry-based method for the confirmatory analysis of endogenous anabolic steroids durin...

von Oliveira, Fábio Azamor de (Autor), ... Casilli, Alessandro (Autor), Piper, Thomas (Autor), da Silva, Thais Reis (Autor), da Silva, Cristiane Abrantes (Autor), da Silva, Raquel Vieira Santana (Autor), Dal Sasso, Marco Aurélio (Autor), Salgueiro, Gutierri Ricardo dos Santos Gonçalves (Autor), Padilha, Monica Costa (Autor), Pereira, Henrique Marcelo Gualberto (Autor), Thevis, Mario (Autor), Radler de Aquino Neto, Francisco (Autor)
Erschienen in Analytical chemistry, 91 (2019), 18, S. 11747–11756, Lit.