Publications 2023

Salvo NM, Andersen JD, Janssen K, Meyer OL, Berg T, Børsting C, Olsen GH (2023)
Association between Variants in the OCA2-HERC2 Region and Blue Eye Colour in HERC2 rs12913832 AA and AG Individuals
Genes (Basel), 14 (3)
DOI 10.3390/genes14030698, PubMed 36980970

Publications 2022

Maria MH, Jørgenrud BM, Berg T (2022)
Determination of eight phosphatidylethanol homologues in blood by reversed phase liquid chromatography-tandem mass spectrometry - How to avoid co-elution of phosphatidylethanols and unwanted phospholipids
J Chromatogr A, 1684, 463566
DOI 10.1016/j.chroma.2022.463566, PubMed 36306689

Publications 2021

Kabashi S, Gamboa D, Vindenes V, Berg T, Hilberg TA, Jørgenrud B, Lerdal A, Bogstrand ST (2021)
Multimorbidity, psychoactive substance use and psychological distress among acute medically ill patients: a cross-sectional study
BMJ Open, 11 (11), e052428
DOI 10.1136/bmjopen-2021-052428, PubMed 34815283

Publications 2020

Bakke E, Høiseth G, Furuhaugen H, Berg T, Arnestad M, Gjerde H (2020)
Oral Fluid to Blood Concentration Ratios of Different Psychoactive Drugs in Samples from Suspected Drugged Drivers
Ther Drug Monit, 42 (5), 795-800
DOI 10.1097/FTD.0000000000000760, PubMed 32251151

Gamboa D, Jørgenrud B, Bryun EA, Vindenes V, Koshkina EA, Nadezhdin AV, Kabashi S, Tetenova EJ, Berg T, Nyman AAT, Kolgashkin AJ, Petukhov AE, Perekhodov SN, Davydova EN, Lerdal A, Nordby G, Bogstrand ST (2020)
Prevalence of psychoactive substance use among acutely hospitalised patients in Oslo and Moscow: a cross-sectional, observational study
BMJ Open, 10 (9), e032572
DOI 10.1136/bmjopen-2019-032572, PubMed 32948540

Jørgenrud B, Skadberg E, de Carvalho Ponce J, Furuhaugen H, Berg T (2020)
Determination of the alcohol biomarker phosphatidylethanol 16:0/18:1 and 33 compounds from eight different drug classes in whole blood by LC-MS/MS
J Pharmacol Toxicol Methods, 107, 106939
DOI 10.1016/j.vascn.2020.106939, PubMed 33257303

Publications 2018

Berg T, Eliassen E, Jørgenrud B, Kabashi S, Petukhov A, Bogstrand ST (2018)
Determination of phosphatidylethanol 16:0/18:1 in whole blood by 96-well supported liquid extraction and UHPLC-MS/MS
J Clin Lab Anal, 33 (1), e22631
DOI 10.1002/jcla.22631, PubMed 30047172

Oiestad AML, Berg T, Eliassen E, Wiklund T, Sand K, Oiestad EL (2018)
Separation of isomers of new psychoactive substances and isotope-labeled amphetamines using UHPSFC-MS/MS and UHPLC-MS/MS
J. Liq. Chromatogr. Relat. Technol., 41 (7), 391-400
DOI 10.1080/10826076.2017.1388818

Takitane J, Leyton V, Andreuccetti G, Gjerde H, Vindenes V, Berg T (2018)
Determination of cocaine, metabolites and a crack cocaine biomarker in whole blood by liquid-liquid extraction and UHPLC-MS/MS
Forensic Sci Int, 289, 165-174
DOI 10.1016/j.forsciint.2018.05.030, PubMed 29885489

Publications 2017

Bergh MS, Bogen IL, Andersen JM, Øiestad ÅML, Berg T (2017)
Determination of adrenaline, noradrenaline and corticosterone in rodent blood by ion pair reversed phase UHPLC-MS/MS
J Chromatogr B Analyt Technol Biomed Life Sci, 1072, 161-172
DOI 10.1016/j.jchromb.2017.11.016, PubMed 29175696

Høiseth G, Gottås A, Berg T, Arnestad M, Halvorsen PS, Bachs LC (2017)
Urinary Kinetics of Heroin Metabolites in Pigs Shortly After Intake
J Anal Toxicol, 41 (5), 451-454
DOI 10.1093/jat/bkx017, PubMed 28335030

Publications 2016

Valen A, Leere Øiestad ÅM, Strand DH, Skari R, Berg T (2016)
Determination of 21 drugs in oral fluid using fully automated supported liquid extraction and UHPLC-MS/MS
Drug Test Anal, 9 (5), 808-823
DOI 10.1002/dta.2045, PubMed 27464485

Publications 2015

Berg T, Kaur L, Risnes A, Havig SM, Karinen R (2015)
Determination of a selection of synthetic cannabinoids and metabolites in urine by UHPSFC-MS/MS and by UHPLC-MS/MS
Drug Test Anal, 8 (7), 708-22
DOI 10.1002/dta.1844, PubMed 26304456

Publications 2014

Berg T, Karlsen M, Oiestad AM, Johansen JE, Liu H, Strand DH (2014)
Evaluation of ¹³C- and ²H-labeled internal standards for the determination of amphetamines in biological samples, by reversed-phase ultra-high performance liquid chromatography-tandem mass spectrometry
J Chromatogr A, 1344, 83-90
DOI 10.1016/j.chroma.2014.04.020, PubMed 24780257

Karlsen M, Liu H, Berg T, Johansen JE, Hoff BH (2014)
Synthesis of [13C6]-labelled phenethylamine derivatives for drug quantification in biological samples
J Labelled Comp Radiopharm, 57 (5), 378-87
DOI 10.1002/jlcr.3193, PubMed 24634286

Publications 2013

Berg T, Jørgenrud B, Strand DH (2013)
Determination of buprenorphine, fentanyl and LSD in whole blood by UPLC-MS-MS
J Anal Toxicol, 37 (3), 159-65
DOI 10.1093/jat/bkt005, PubMed 23423312

Publications 2011

Berg T, Strand DH (2011)
¹³C labelled internal standards--a solution to minimize ion suppression effects in liquid chromatography-tandem mass spectrometry analyses of drugs in biological samples?
J Chromatogr A, 1218 (52), 9366-74
DOI 10.1016/j.chroma.2011.10.081, PubMed 22119139

Publications 2008

Berg T, Lundanes E, Christophersen AS, Strand DH (2008)
Determination of opiates and cocaine in urine by high pH mobile phase reversed phase UPLC-MS/MS
J Chromatogr B Analyt Technol Biomed Life Sci, 877 (4), 421-32
DOI 10.1016/j.jchromb.2008.12.052, PubMed 19144579

Publications 2007

Hegstad S, Khiabani HZ, Øiestad EL, Berg T, Christophersen AS (2007)
Rapid quantification of buprenorphine-glucuronide and norbuprenorphine-glucuronide in human urine by LC-MS-MS
J Anal Toxicol, 31 (4), 214-9
DOI 10.1093/jat/31.4.214, PubMed 17555645