High-throughput liquid chromatography tandem mass spectrometry assay as initial testing procedure for analysis of total urinary fraction

von Sobolevsky, Tim (Autor), ... Ahrens, Brian (Autor)
Erschienen in Drug testing and analysis, 13 (2021), 2, S. 283-298, Lit.

Biotin as a masking agent in chorionic gonadotropin assays utilizing biotinylated antibodies

von Sobolevsky, Tim (Autor), ... Ahrens, Brian (Autor)
Erschienen in Drug testing and analysis, 13 (2021), 11/12 (The 39th Manfred Donike workshop on doping analysis), S. 1929-1935, Lit.

Detection of capromorelin in urine following oral and dermal routes of administration

von Sobolevsky, Tim (Autor), ... Walpurgis, Katja (Autor), Goergens, Christian (Autor), Fedoruk, Matthew (Autor), Lewis, Laura (Autor), Ahrens, Brian (Autor), Thevis, Mario (Autor)
Erschienen in Drug testing and analysis, 15 (2023), 11/12 (The 41st Manfred Donike Workshop on Doping Analysis), S. 1449-1453, Lit.

δ13C values of urinary 19-norandrosterone in antidoping samples and potential for adverse findings from boar offal consumption

von Nair, Vinod S. (Autor), ... Howa, John D. (Autor), Morrison, Matthew S. (Autor), Beggs, Lacey (Autor), Campbell, Thane (Autor), Fedoruk, Matthew (Autor), Ahrens, Brian (Autor), Eichner, Daniel (Autor)
Erschienen in Drug testing and analysis, 15 (2023), 11/12 (The 41st Manfred Donike Workshop on Doping Analysis), S. 1356-1360, 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.

Urinary concentrations of AICAR and mannitol in athlete population

von Sobolevsky, Tim (Autor), ... Ahrens, Brian (Autor)
Erschienen in Drug testing and analysis, 11 (2019), 3, S. 530-535, Lit.