1. AICAr to SAICAr ratio can serve as additional marker of AICAr use. Issue 11 (16th November 2022) Authors: Sobolevsky, Tim; Piper, Thomas; Ahrens, Brian; Thevis, Mario Journal: Drug testing and analysis Issue: Volume 14:Issue 11/12(2022) Page Start: 2017 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Biotin as a masking agent in chorionic gonadotropin assays utilizing biotinylated antibodies. Issue 11 (27th August 2021) Authors: Sobolevsky, Tim; Ahrens, Brian Journal: Drug testing and analysis Issue: Volume 13:Issue 11/12(2021) Page Start: 1929 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
3. Chromatographic‐mass spectrometric analysis of the urinary metabolite profile of chlorphenesin observed after dermal application of chlorphenesin‐containing sunscreen. (19th September 2021) Authors: Rubio, Ana; Görgens, Christian; Krug, Oliver; Okano, Masato; Fedoruk, Matthew; Ahrens, Brian; Geyer, Hans; Thevis, Mario Journal: Rapid communications in mass spectrometry Issue: Volume 35:Number 21(2021) Page Start: n/a Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
4. High‐throughput liquid chromatography tandem mass spectrometry assay as initial testing procedure for analysis of total urinary fraction. Issue 2 (2nd September 2020) Authors: Sobolevsky, Tim; Ahrens, Brian Journal: Drug testing and analysis Issue: Volume 13:Issue 2(2021) Page Start: 283 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
5. Inter-Laboratory Agreement of Insulin-like Growth Factor 1 Concentrations Measured Intact by Mass Spectrometry. (17th February 2020) Authors: Moncrieffe, Danielle; Cox, Holly D; Carletta, Samantha; Becker, Jessica O; Thomas, Andreas; Eichner, Daniel; Ahrens, Brian; Thevis, Mario; Bowers, Larry D; Cowan, David A; Hoofnagle, Andrew N Journal: Clinical chemistry Issue: Volume 66:Number 4(2020) Page Start: 579 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
6. Isotopically labeled boldenone as a better marker of derivatization efficiency for improved quality control in anti‐doping analysis. Issue 2 (26th December 2018) Authors: Sobolevsky, Tim; Kucherova, Yulia; Ahrens, Brian Journal: Drug testing and analysis Issue: Volume 11:Issue 2(2019) Page Start: 336 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
7. Measurement of urinary cobalt as its complex with 2‐(5‐chloro‐2‐pyridylazo)‐5‐diethylaminophenol by liquid chromatography–tandem mass spectrometry for the purpose of anti‐doping control. Issue 6 (27th January 2021) Authors: Sobolevsky, Tim; Ahrens, Brian Journal: Drug testing and analysis Issue: Volume 13:Issue 6(2021) Page Start: 1145 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
8. Urinary concentrations of AICAR and mannitol in athlete population. Issue 3 (4th January 2019) Authors: Sobolevsky, Tim; Ahrens, Brian Journal: Drug testing and analysis Issue: Volume 11:Issue 3(2019) Page Start: 530 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗