Publications by authors named "S Hegstad"

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Quantitative determination of R/S-methadone in human serum using ultra-high performance supercritical fluid chromatography-tandem mass spectrometry: A method for routine use.
Miriam Hansen, Hilde Havnen, Trine Naalsund Andreassen, Olav Spigset, Solfrid Hegstad

Drug Test Anal· July 2024

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Conductive vial electromembrane extraction of opioids from oral fluid.
Tonje Gottenberg Skaalvik, Chen Zhou, Elisabeth Leere Øiestad, Solfrid Hegstad, Roger Trones

Anal Bioanal Chem· September 2023

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Determination of amphetamine enantiomers in urine by conductive vial electromembrane extraction and ultra-high performance supercritical fluid chromatography tandem mass spectrometry.
Tonje Gottenberg Skaalvik, Elisabeth Leere Øiestad, Stig Pedersen-Bjergaard, Solfrid Hegstad

Drug Test Anal· August 2023

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Serum or Plasma for Quantification of Direct Oral Anticoagulants?
Rachel Aakerøy, Charlotte L Stokes, Marija Tomić, Solfrid Hegstad, Ann Helen Kristoffersen

Ther Drug Monit· August 2022

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Determination of psychoactive drugs in serum using conductive vial electromembrane extraction combined with UHPLC-MS/MS.
Tonje Gottenberg Skaalvik, Elisabeth Leere Øiestad, Roger Trones, Stig Pedersen-Bjergaard, Solfrid Hegstad

J Chromatogr B Analyt Technol Biomed Life Sci· October 2021

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