Ruprecht Keller

Ruprecht Keller

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Ruprecht Keller

Ruprecht Keller

Publications by authors named "Ruprecht Keller"

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False-negative results in the immunoassay analysis of drugs of abuse: can adulterants be detected by sample check test?

Ann Clin Biochem 2018 May 20;55(3):348-354. Epub 2017 Sep 20.

2 Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry, RWTH University Hospital Aachen, Aachen, Germany.

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http://dx.doi.org/10.1177/0004563217725089DOI Listing
May 2018

The Urine Marker Test: An Alternative Approach to Supervised Urine Collection for Doping Control.

Sports Med 2016 Jan;46(1):15-22

UCLA Olympic Analytical Laboratory, Department of Pathology and Laboratory Medicine, Geffen School of Medicine at UCLA, 2122 Granville Ave, Los Angeles, CA, 90025-6106, USA.

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http://www.markertest.com/file_616-215152-1157/marker-test-p
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http://dx.doi.org/10.1007/s40279-015-0388-6DOI Listing
January 2016

Efficacy of a polyethylene glycol marker system in urine drug screening in an opiate substitution program.

Eur Addict Res 2008 27;14(4):186-9. Epub 2008 Jun 27.

Department of Addiction Medicine, Hospital München-Schwabing, Munich, Germany.

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http://www.marker-test.de/file_722-205485-3641/backmund-kell
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http://www.karger.com/doi/10.1159/000141642
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http://dx.doi.org/10.1159/000141642DOI Listing
May 2009

Clinical use of polyethylene glycols as marker substances and determination in urine by liquid chromatography.

J Chromatogr B Analyt Technol Biomed Life Sci 2003 Apr;787(2):271-9

Kliniken der Stadt Köln, Zentrallabor, Ostmerheimerstrasse 200, 51109 Köln, Germany.

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http://dx.doi.org/10.1016/s1570-0232(02)00925-xDOI Listing
April 2003