Nikolai Stephanson

Most-cited papers

1. Comparison of urinary excretion characteristics of ethanol and ethyl glucuronide.

   H. Dahl, Nikolai Stephanson, O. Beck, A. Helander

   2002Journal of Analytical Toxicology201 citations Open access

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2. Direct Quantification of Ethyl Glucuronide in Clinical Urine Samples by Liquid Chromatography–Mass Spectrometry

   Nikolai Stephanson, H. Dahl, A. Helander, O. Beck

   2002Therapeutic Drug Monitoring112 citations

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3. Validation of direct injection electrospray LC-MS/MS for confirmation of opiates in urine drug testing.

   E. Gustavsson, Maria Andersson, Nikolai Stephanson, Olof Beck

   2007Journal of Mass Spectrometry82 citations

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4. Comparison of ethyl glucuronide in hair with phosphatidylethanol in whole blood as post-mortem markers of alcohol abuse.

   Peter Bendroth, R. Kronstrand, A. Helander, Jesper Greby +2 more

   2008Forensic Science International69 citations

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5. Direct injection LC-MS/MS method for identification and quantification of amphetamine, methamphetamine, 3,4-methylenedioxyamphetamine and 3,4-methylenedioxymethamphetamine in urine drug testing.

   M. Andersson, E. Gustavsson, Nikolai Stephanson, O. Beck

   2008Journal of chromatography. B, Analytical technologies in the biomedical and life sciences52 citations

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6. 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, A. Helander, O. Beck

   2007Journal of Mass Spectrometry29 citations

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7. 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, M. Josefsson, R. Kronstrand, O. Beck

   2008Journal of chromatography. B, Analytical technologies in the biomedical and life sciences26 citations

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8. Biomarkers to disclose recent intake of alcohol: potential of 5-hydroxytryptophol glucuronide testing using new direct UPLC-tandem MS and ELISA methods.

   O. Beck, Nikolai Stephanson, Michael Böttcher, N. Dahmen +2 more

   2007Alcohol and Alcoholism23 citations

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9. Direct and efficient liquid chromatographic-tandem mass spectrometric method for opiates in urine drug testing - importance of 6-acetylmorphine and reduction of analytes.

   M. Andersson, Nikolai Stephanson, I. Ohman, Tommy Terzuoli +2 more

   2014Drug Testing and Analysis19 citations

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10. Determination of urinary 5-hydroxytryptophol glucuronide by liquid chromatography-mass spectrometry.

    Nikolai Stephanson, H. Dahl, A. Helander, O. Beck

    2005Journal of chromatography. B, Analytical technologies in the biomedical and life sciences17 citations

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11. Ecstasy Analogues Found in Cacti

    J. Bruhn, Hesham R. Ei-Seedi, Nikolai Stephanson, O. Beck +1 more

    2008Journal of Psychoactive Drugs13 citations

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12. LC-MS / MS determination of urinary 5-hydroxytryptophol glucuronide and 5-hydroxyindole-3-acetic acid

    Nikolai Stephanson, O. Beck, A. Helander

    20060 citations

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