Publications by authors named "Nikolai Stephanson"

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Direct and efficient liquid chromatographic-tandem mass spectrometric method for opiates in urine drug testing - importance of 6-acetylmorphine and reduction of analytes.
Maria Andersson, Nikolai Stephanson, Inger Ohman, Tommy Terzuoli, Jonatan D Lindh

Drug Test Anal· April 2014

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Accurate identification and quantification of 11-nor-delta(9)-tetrahydrocannabinol-9-carboxylic acid in urine drug testing: evaluation of a direct high efficiency liquid chromatographic-mass spectrometric method.
Nikolai Stephanson, Martin Josefsson, Robert Kronstrand, Olof Beck

J Chromatogr B Analyt Technol Biomed Life Sci· August 2008

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Ecstasy analogues found in cacti.
Jan G Bruhn, Hesham R El-Seedi, Nikolai Stephanson, Olof Beck, Alexander T Shulgin

J Psychoactive Drugs· June 2008

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Comparison of ethyl glucuronide in hair with phosphatidylethanol in whole blood as post-mortem markers of alcohol abuse.
Peter Bendroth, Robert Kronstrand, Anders Helander, Jesper Greby, Nikolai Stephanson

Forensic Sci Int· March 2008

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Biomarkers to disclose recent intake of alcohol: potential of 5-hydroxytryptophol glucuronide testing using new direct UPLC-tandem MS and ELISA methods.
Olof Beck, Nikolai Stephanson, Michael Böttcher, Norbert Dahmen, Christoph Fehr

Alcohol Alcohol· January 2008

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Alcohol biomarker analysis: simultaneous determination of 5-hydroxytryptophol glucuronide and 5-hydroxyindoleacetic acid by direct injection of urine using ultra-performance liquid chromatography-tandem mass spectrometry.
Nikolai Stephanson, Anders Helander, Olof Beck

J Mass Spectrom· July 2007

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Determination of urinary 5-hydroxytryptophol glucuronide by liquid chromatography-mass spectrometry.
Nikolai Stephanson, Helen Dahl, Anders Helander, Olof Beck

J Chromatogr B Analyt Technol Biomed Life Sci· February 2005

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Comparison of urinary excretion characteristics of ethanol and ethyl glucuronide.
Helen Dahl, Nikolai Stephanson, Olof Beck, Anders Helander

J Anal Toxicol· November 2002

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Direct quantification of ethyl glucuronide in clinical urine samples by liquid chromatography-mass spectrometry.
Nikolai Stephanson, Helen Dahl, Anders Helander, Olof Beck

Ther Drug Monit· October 2002

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