Lena Kristoffersen

Simultaneous determination of 6 beta-blockers, 3 calcium-channel antagonists, 4 angiotensin-II antagonists and 1 antiarrhytmic drug in post-mortem whole blood by automated solid phase extraction and liquid chromatography mass spectrometry

Lena Kristoffersen, Elisabeth Leere Øiestad, Mimi Stokke Opdal et al. · Journal of Chromatography B · 2006 · 146 citations

Thrombosis, Hypertension, Calcium-channel Antagonists +13

Simultaneous determination of citalopram, fluoxetine, paroxetine and their metabolites in plasma and whole blood by high-performance liquid chromatography with ultraviolet and fluorescence detection

Lena Kristoffersen, Andreas Bugge, Elsa Lundanes et al. · Journal of Chromatography B Biomedical Sciences and Applications · 1999 · 133 citations

Fluorescence Detection, Biochemistry, Gas Chromatography +14

Prevalence of alcohol and drugs among Norwegian motor vehicle drivers: A roadside survey

Hallvard Gjerde, Per T. Normann, B Pettersen et al. · Accident Analysis & Prevention · 2008 · 123 citations

Substance Abuse, Substance Use, Driver Behavior +8

Headspace gas chromatographic determination of ethanol: The use of factorial design to study effects of blood storage and headspace conditions on ethanol stability and acetaldehyde formation in whole blood and plasma

Lena Kristoffersen, Liv-Ellen Stormyhr, Anne Smith‐Kielland · Forensic Science International · 2006 · 114 citations

Gas Chromatography, Bioanalysis, Forensic Toxicology +8

Drug Screening of Hair by Liquid Chromatography-Tandem Mass Spectrometry

Solfrid Hegstad, Hassan Z. Khiabani, Lena Kristoffersen et al. · Journal of Analytical Toxicology · 2008 · 94 citations · Full text

Drug Screening, Dermatology, Bioanalysis +16