Publications by authors named "Ute Mareck"

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Risk of unintentional antidoping rule violations by consumption of hemp products.
Ute Mareck, Gregor Fusshöller, Thomas Schertel, Simon Petring, Marilyn A Huestis

Drug Test Anal· January 2023

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Detection of undeclared doping substances in nutritional supplements in the context of follow-up investigations concerning adverse analytical findings.
Ute Mareck, Hans Geyer, Thomas Schertel, Simon Petring, Oliver Krug

Drug Test Anal· November 2021

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Preliminary data on the potential for unintentional antidoping rule violations by permitted cannabidiol (CBD) use.
Ute Mareck, Gregor Fusshöller, Hans Geyer, Marilyn A Huestis, Anja B Scheiff

Drug Test Anal· March 2021

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Dietary Supplement and Food Contaminations and Their Implications for Doping Controls.
Katja Walpurgis, Andreas Thomas, Hans Geyer, Ute Mareck, Mario Thevis

Foods· July 2020

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Determination of salbutamol and salbutamol glucuronide in human urine by means of liquid chromatography-tandem mass spectrometry.
Ute Mareck, Sven Guddat, Anne Schwenke, Simon Beuck, Hans Geyer

Drug Test Anal· May 2012

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Reporting and managing elevated testosterone/epitestosterone ratios--novel aspects after five years' experience.
Ute Mareck, Hans Geyer, Gregor Fusshöller, Anne Schwenke, Nadine Haenelt

Drug Test Anal· May 2011

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Investigations on changes in ¹³C/¹²C ratios of endogenous urinary steroids after pregnenolone administration.
Thomas Piper, Christoph Schlug, Ute Mareck, Wilhelm Schänzer

Drug Test Anal· May 2011

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Temporal indication of cannabis use by means of THC glucuronide determination.
Ute Mareck, Nadine Haenelt, Hans Geyer, Sven Guddat, Matthias Kamber

Drug Test Anal· November 2009

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Determination of 13C/12C ratios of urinary epitestosterone and its main metabolites 5alpha- and 5beta-androstane-3alpha, 17alpha-diol.
Thomas Piper, Phillip Riemann, Georg Opfermann, Ute Mareck, Hans Geyer

Drug Test Anal· November 2009

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13C/12C ratios of endogenous urinary steroids investigated for doping control purposes.
Thomas Piper, Ulrich Flenker, Ute Mareck, Wilhelm Schänzer

Drug Test Anal· February 2009

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Determination of the prevalence of anabolic steroids, stimulants, and selected drugs subject to doping controls among elite sport students using analytical chemistry.
Mario Thevis, Michael Sauer, Hans Geyer, Gerd Sigmund, Ute Mareck

J Sports Sci· August 2008

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Determination of 13C/12C ratios of endogenous urinary steroids: method validation, reference population and application to doping control purposes.
Thomas Piper, Ute Mareck, Hans Geyer, Ulrich Flenker, Mario Thevis

Rapid Commun Mass Spectrom· July 2008

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Nutritional supplements cross-contaminated and faked with doping substances.
Hans Geyer, Maria Kristina Parr, Karsten Koehler, Ute Mareck, Wilhelm Schänzer

J Mass Spectrom· July 2008

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Factors influencing the steroid profile in doping control analysis.
Ute Mareck, Hans Geyer, Georg Opfermann, Mario Thevis, Wilhelm Schänzer

J Mass Spectrom· July 2008

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Detection of dehydroepiandrosterone misuse by means of gas chromatography- combustion-isotope ratio mass spectrometry.
Ute Mareck, Hans Geyer, Ulrich Flenker, Thomas Piper, Mario Thevis

Eur J Mass Spectrom (Chichester)· June 2008

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Detection of manipulation in doping control urine sample collection: a multidisciplinary approach to determine identical urine samples.
Mario Thevis, Hans Geyer, Ute Mareck, Gerd Sigmund, Jürgen Henke

Anal Bioanal Chem· August 2007

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Identification of the aromatase inhibitors anastrozole and exemestane in human urine using liquid chromatography/tandem mass spectrometry.
Ute Mareck, Hans Geyer, Sven Guddat, Nadine Haenelt, Anja Koch

Rapid Commun Mass Spectrom· July 2007

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Doping-control analysis of the 5alpha-reductase inhibitor finasteride: determination of its influence on urinary steroid profiles and detection of its major urinary metabolite.
Mario Thevis, Hans Geyer, Ute Mareck, Ulrich Flenker, Wilhelm Schänzer

Ther Drug Monit· April 2007

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High amounts of 17-methylated anabolic-androgenic steroids in effervescent tablets on the dietary supplement market.
Maria K Parr, Hans Geyer, Bernhard Hoffmann, Karsten Köhler, Ute Mareck

Biomed Chromatogr· February 2007

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Determination of the origin of urinary norandrosterone traces by gas chromatography combustion isotope ratio mass spectrometry.
Moritz Hebestreit, Ulrich Flenker, Gregor Fusshöller, Hans Geyer, Ute Güntner, Ute Mareck

Analyst· September 2006

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Screening for unknown synthetic steroids in human urine by liquid chromatography-tandem mass spectrometry.
Mario Thevis, Hans Geyer, Ute Mareck, Wilhelm Schänzer

J Mass Spectrom· July 2005

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