Blar i NTNU Open på forfatter "Skaalvik, Tonje Gottenberg"
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Conductive vial electromembrane extraction of opioids from oral fluid
Skaalvik, Tonje Gottenberg; Zhou, Chen; Øiestad, Elisabeth Leere; Hegstad, Solfrid; Trones, Roger; Pedersen-Bjergaard, Stig (Peer reviewed; Journal article, 2023)The use of oral fluid as sample matrix has gained significance in the analysis of drugs of abuse due to its non-invasive nature. In this study, the 13 opioids morphine, oxycodone, codeine, O-desmethyl tramadol, ethylmorphine, ... -
Conductive vial electromembrane extraction – Principles and practical operation
Schüller, Maria; Hansen, Frederik Andre; Skaalvik, Tonje Gottenberg; Pedersen-Bjergaard, Stig (Peer reviewed; Journal article, 2023)Electromembrane extraction (EME) is a microextraction technique where charged analytes are extracted from an aqueous sample solution, through a liquid membrane, and into an aqueous acceptor, under the influence of an ... -
Determination of amphetamine enantiomers in urine by conductive vial electromembrane extraction and ultra-high performance supercritical fluid chromatography tandem mass spectrometry
Skaalvik, Tonje Gottenberg; Øiestad, Elisabeth Leere; Pedersen-Bjergaard, Stig; Hegstad, Solfrid (Peer reviewed; Journal article, 2023)Separation and quantification of amphetamine enantiomers are commonly used to distinguish between consumption of prescription amphetamine (mostly S ‐amphetamine) and illicit forms of the drug (racemate). In this study, ... -
Determination of psychoactive drugs in serum using conductive vial electromembrane extraction combined with UHPLC-MS/MS
Skaalvik, Tonje Gottenberg; Øiestad, Elisabeth Leere; Trones, Roger; Pedersen-Bjergaard, Stig; Hegstad, Solfrid (Peer reviewed; Journal article, 2021)Conductive vial electromembrane extraction (EME) with prototype equipment was applied for the first time to extract lipophilic basic drugs from serum. With this equipment, traditional platinum electrodes were replaced with ... -
Overdragsundersøkelse for redusering av vasketid mellom injeksjoner på UPLC-MS/MS for løsemiddelbesparing
Flasnes, Silje; Ormar, Thea; Sveen, Fredrikke (Bachelor thesis, 2024)Ved analyse av lege- og rusmidler og enkelte vitaminer benyttes Ultra Performance Liquid Chromatography - Tandem Mass Spectrometry (UPLC-MS/MS). For å hindre overdrag mellom prøvene blir injeksjonsnålen til UPLC-MS/MS ... -
Per- and poly-fluoroalkyl substances (PFAS) do not accumulate with age or affect population survival in ruddy turnstone (Arenaria interpres)
Ross, Tobias A.; Zhang, Junjie; Skaalvik, Tonje Gottenberg; Atkinson, Robyn; Jessop, Roz; Asimakopoulos, Alexandros; Jaspers, Veerle Leontina B; Klaassen, Marcel (Journal article; Peer reviewed, 2024)Per- and poly-fluoroalkyl substances (PFAS) may threaten wildlife due to their high environmental persistence, toxicity potential and potential to bioaccumulate. Bioaccumulation may be particularly profound in long-lived ... -
Per- and polyfluoroalkyl substances in shorebirds of Australia
Skaalvik, Tonje Gottenberg (Master thesis, 2020)Australske kystomåder og våtmarker innehar viktige habitater for dyreliv. I disse områdene forbereder trekkfugler seg på sin kommende reise til hekkeområder i nord ved å søke etter mat for å samle opp energi. Kystfugler ...