Publications 2022

Oshaug K, Kronstrand R, Kugelberg FC, Kristoffersen L, Morland J, Hoiseth G (2022)
Frequency of postmortem ethanol formation in blood, urine and vitreous humor-Improving diagnostic accuracy with the use of ethylsulphate and putrefactive alcohols
Forensic Sci.Int., 331, 111152
DOI 10.1016/j.forsciint.2021.111152

Publications 2021

Midtlyng L, Hoiseth G, Luytkis H, Kristoffersen L, Le Nygaard I, Strand MC, Arnestad M, Vevelstad M (2021)
Relationship between betahydroxybutyrate (BHB) and acetone concentrations in postmortem blood and cause of death
Forensic Sci.Int., 321, 110726
DOI 10.1016/j.forsciint.2021.110726

Sidqey D, Liane VH, Kristoffersen L (2021)
Quantitative Determination of Ethyl Glucuronide and Ethyl Sulfate in Postmortem and Antemortem Whole Blood Using Phospholipid Removal 96-Well Plate and UHPLC-MS-MS
J. Anal. Toxicol., 45 (4), 378-388
DOI 10.1093/jat/bkaa108

Publications 2018

Oiestad AML, Karinen R, Rogde S, Nilsen S, Eldor KBB, Brochmann GW, Arnestad M, Oiestad EL, Peres MD, Kristoffersen L, Vindenes V (2018)
Comparative Study of Postmortem Concentrations of Antidepressants in Several Different Matrices
J. Anal. Toxicol., 42 (7), 446-458
DOI 10.1093/jat/bky030

Publications 2017

Hegstad S, Kristoffersen L, Liane VH, Spigset O (2017)
EtG and EtS in Autopsy Blood Samples With and Without Putrefaction Using UPLC-MS-MS
J. Anal. Toxicol., 41 (2), 107-113
DOI 10.1093/jat/bkw123

Publications 2016

Hoiseth G, Wiik E, Kristoffersen L, Morland J (2016)
Ethanol elimination rates at low concentrations based on two consecutive blood samples
Forensic Sci.Int., 266, 191-196
DOI 10.1016/j.forsciint.2016.05.039

Kristoffersen L, Strand DH, Liane VH, Vindenes V, Tvete IF, Aldrin M (2016)
Determination of safety margins for whole blood concentrations of alcohol and nineteen drugs in driving under the influence cases
Forensic Sci.Int., 259, 119-126
DOI 10.1016/j.forsciint.2015.12.009

Publications 2013

Vindenes V, Strand DH, Kristoffersen L, Boix F, Morland J (2013)
Has the intake of THC by cannabis users changed over the last decade? Evidence of increased exposure by analysis of blood THC concentrations in impaired drivers
Forensic Sci.Int., 226 (1-3), 197-201
DOI 10.1016/j.forsciint.2013.01.017

Publications 2008

Gjerde H, Normann PT, Pettersen BS, Assum T, Aldrin M, Johansen U, Kristoffersen L, Oiestad EL, Christophersen AS, Morland J (2008)
Prevalence of alcohol and drugs among Norwegian motor vehicle drivers: A roadside survey
Accid. Anal. Prev., 40 (5), 1765-1772
DOI 10.1016/j.aap.2008.06.015

Hoiseth G, Kristoffersen L, Larssen B, Arnestad M, Hermansen NO, Morland J (2008)
In vitro formation of ethanol in autopsy samples containing fluoride ions
Int. J. Legal Med., 122 (1), 63-66
DOI 10.1007/s00414-007-0166-6

Publications 2007

Kristoffersen L, Oiestad EL, Opdal MS, Krogh M, Lundanes E, Christophersen AOS (2007)
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 - Method development and robustness testing by experimental design
J. Chromatogr. B, 850 (1-2), 147-160
DOI 10.1016/j.jchromb.2006.11.030

Publications 2006

Kristoffersen L, Stormyhr LE, Smith-Kielland A (2006)
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
Forensic Sci.Int., 161 (2-3), 151-157
DOI 10.1016/j.forsciint.2006.03.034

Publications 1992

Hansen HB, Kristoffersen L, Lie E (1992)
En teknisk/økonomisk studie av ulike metoder for redusertgassemisjon fr a SiC-produksjon
[Forfatterene], Kristiansand, 44 bl. + vedlegg
BIBSYS 941413756