Validation of direct injection electrospray LC-MS/MS for confirmation of opiates in urine drug testing
Gustavsson, E., Andersson, M., Stephanson, N., Beck, O.
Published in Journal of mass spectrometry. (01.07.2007)
Published in Journal of mass spectrometry. (01.07.2007)
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Journal Article
Direct injection LC–MS/MS method for identification and quantification of amphetamine, methamphetamine, 3,4-methylenedioxyamphetamine and 3,4-methylenedioxymethamphetamine in urine drug testing
Andersson, M., Gustavsson, E., Stephanson, N., Beck, O.
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (2008)
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (2008)
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Journal Article
Plasma concentration of ketorolac after local infiltration analgesia in hip arthroplasty
AFFAS, F., EKSBORG, S., WRETENBERG, P., OLOFSSON, C., STEPHANSON, N., STILLER, C.-O.
Published in Acta anaesthesiologica Scandinavica (01.10.2014)
Published in Acta anaesthesiologica Scandinavica (01.10.2014)
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Journal Article
Comparison between the urinary alcohol markers EtG, EtS, and GTOL/5-HIAA in a controlled drinking experiment
Høiseth, Gudrun, Bernard, Jean Paul, Stephanson, Nicolai, Normann, Per T., Christophersen, Asbjørg S., Mørland, Jørg, Helander, Anders
Published in Alcohol and alcoholism (Oxford) (01.03.2008)
Published in Alcohol and alcoholism (Oxford) (01.03.2008)
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Journal Article
Comparison of Urinary Excretion Characteristics of Ethanol and Ethyl Glucuronide
Dahl, Helen, Stephanson, Nikolai, Beck, Olof, Helander, Anders
Published in Journal of analytical toxicology (01.05.2002)
Published in Journal of analytical toxicology (01.05.2002)
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Journal Article
Pharmacokinetics after a single intravenous dose of the opioid ketobemidone in neonates
LUNDEBERG, S., STEPHANSON, N., STILLER, C.-O., EKSBORG, S.
Published in Acta anaesthesiologica Scandinavica (01.09.2012)
Published in Acta anaesthesiologica Scandinavica (01.09.2012)
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Journal Article
Pharmacokinetics after an intravenous single dose of the opioid ketobemidone in children
LUNDEBERG, S., STEPHANSON, N., LAFOLIE, P., OLSSON, G. L., STILLER, C.-O., EKSBORG, S.
Published in Acta anaesthesiologica Scandinavica (01.04.2010)
Published in Acta anaesthesiologica Scandinavica (01.04.2010)
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Journal Article
Determination of perhexiline and hydroxyperhexiline in plasma by liquid chromatography–mass spectrometry
Beck, O., Stephanson, N., Morris, R.G., Sallustio, B.C., Hjemdahl, P.
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (05.06.2004)
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (05.06.2004)
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Journal Article
Biomarkers to disclose recent intake of alcohol: potential of 5-hydroxytryptophol glucuronide testing using new direct UPLC-tandem MS and ELISA methods
Beck, Olof, Stephanson, Nikolai, Böttcher, Michael, Dahmen, Norbert, Fehr, Christoph, Helander, Anders
Published in Alcohol and alcoholism (Oxford) (01.07.2007)
Published in Alcohol and alcoholism (Oxford) (01.07.2007)
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Journal Article
Method validation and application of a liquid chromatography–tandem mass spectrometry method for drugs of abuse testing in exhaled breath
Stephanson, Niclas, Sandqvist, Sören, Lambert, Marjan Shafaati, Beck, Olof
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (15.03.2015)
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (15.03.2015)
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Journal Article
Detection of Drugs of Abuse in Exhaled Breath from Users Following Recovery from Intoxication
Beck, Olof, Stephanson, Niclas, Sandqvist, Sören, Franck, Johan
Published in Journal of analytical toxicology (01.11.2012)
Published in Journal of analytical toxicology (01.11.2012)
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Journal Article
Comparison of ethyl glucuronide in hair with phosphatidylethanol in whole blood as post-mortem markers of alcohol abuse
Bendroth, Peter, Kronstrand, Robert, Helander, Anders, Greby, Jesper, Stephanson, Nikolai, Krantz, Peter
Published in Forensic science international (2008)
Published in Forensic science international (2008)
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Journal Article
Conference Proceeding
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
Stephanson, Nikolai, Josefsson, Martin, Kronstrand, Robert, Beck, Olof
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (01.08.2008)
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (01.08.2008)
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Journal Article
Direct and efficient liquid chromatographic-tandem mass spectrometric method for opiates in urine drug testing - importance of 6-acetylmorphine and reduction of analytes
Andersson, Maria, Stephanson, Nikolai, Ohman, Inger, Terzuoli, Tommy, Lindh, Jonatan D, Beck, Olof
Published in Drug testing and analysis (01.04.2014)
Published in Drug testing and analysis (01.04.2014)
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Journal Article
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
Stephanson, Nikolai, Helander, Anders, Beck, Olof
Published in Journal of mass spectrometry. (01.07.2007)
Published in Journal of mass spectrometry. (01.07.2007)
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Journal Article