Hardware-considerations for purification of steroids by normal-phase HPLC for GC-C-IRMS

von Hebestreit, M. (Autor), ... Flenker, Ulrich (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (12) : Proceedings of the Manfred Donike Workshop ; 22th Cologne Workshop on Dope Analysis ; 7th to 12th March 2004, Köln: Sport u. Buch Strauß (Verlag), 2004, S. 323-327, Lit.

Evolving concepts and techniques for anti-doping

von Friedmann, Theodore (Autor), ... Flenker, Ulrich (Autor), Georgakopoulos, Costas G. (Autor), Alsayrafi, Mohammed (Autor), Sottas, Pierre-Edouard (Autor), Williams, Steven A. (Autor), Gill, Rosalynn D. (Autor)
Erschienen in Bioanalysis, 4 (2012), 13, S. 1667-1680, Lit.

Improved performance and maintenance in gas chromatography/isotope ratio mass spectrometry by precolumn solvent removal

von Flenker, Ulrich (Autor), ... Hebestreit, Moritz (Autor), Piper, Thomas (Autor), Hülsemann, Frank (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Analytical chemistry, 79 (2007), 11, S. 4162-4168, Lit.

Determination of salbutamol and salbutamol glucuronide in human urine by means of liquid chromatography-tandem mass spectrometry

von Mareck, Ute (Autor), ... Guddat, Sven (Autor), Schwenke, Anne (Autor), Beuck, Simon (Autor), Geyer, Hans (Autor), Flenker, Ulrich (Autor), Elers, Jimmi (Autor), Backer, Vibeke (Autor), Thevis, Mario (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Drug testing and analysis, 3 (2011), 11/12 (29th Cologne Workshop: Advances in Sports Drug Testing), S. 820-827, 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.

Application of stable carbon isotope analysis to the detection of 17β-estradiol administration to cattle

von Buisson, Corinne (Autor), ... Hebestreit, Moritz (Autor), Preiss-Weigert, Angelika (Autor), Heinrich, Katharina (Autor), Fry, Hildburg (Autor), Flenker, Ulrich (Autor), Banneke, S. (Autor), Prevost, S. (Autor), Andre, Francois (Autor), Schänzer, Wilhelm (Autor), Houghton, E. (Autor), Le Bizec, Bruno (Autor)
Erschienen in Journal of chromatography / A, 1093 (2005), 1-2, S. 69-80, Lit.

Isotope ratio mass spectrometry : history and terminology in brief

von Flenker, Ulrich (Autor) ...
Erschienen in Drug testing and analysis, 4 (2012), 12 (Stable isotope ratio analysis in sports anti-doping), S. 893-896, Lit.

Application of stable carbon isotope analysis to the detection of testosterone administration to cattle

von Hebestreit, Moritz (Autor), ... Flenker, Ulrich (Autor), Buisson, Corinne (Autor), Andre, Francois (Autor), Le Bizec, Bruno (Autor), Fry, Hildburg (Autor), Lang, Melanie_ (Autor), Preiss Weigert, Angelika (Autor), Heinrich, Katharina (Autor), Hird, Simon (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Journal of agricultural and food chemistry, 54 (2006), 8, S. 2850-2858, Lit.