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  1. No Access

    Article

    In vitro stability of free and glucuronidated cannabinoids in blood and plasma collected in plastic gray-top sodium fluoride tubes following controlled smoked cannabis

    Blood and plasma cannabinoid stability is important for test interpretation and is best studied in authentic rather than fortified samples. Previous studies employed green-top (sodium heparin) tubes; however, ...

    Karl B. Scheidweiler, Sarah K. Himes, Nathalie A. Desrosiers… in Forensic Toxicology (2016)

  2. No Access

    Article

    Validation of a novel method to identify in utero ethanol exposure: simultaneous meconium extraction of fatty acid ethyl esters, ethyl glucuronide, and ethyl sulfate followed by LC-MS/MS quantification

    Presence of fatty acid ethyl esters (FAEE), ethyl glucuronide (EtG), and ethyl sulfate (EtS) in meconium, the first neonatal feces, identifies maternal alcohol consumption during pregnancy. Current meconium al...

    Sarah K. Himes, Marta Concheiro… in Analytical and Bioanalytical Chemistry (2014)

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    Article

    11-Nor-9-carboxy-∆9-tetrahydrocannabinol quantification in human oral fluid by liquid chromatography–tandem mass spectrometry

    Currently, ∆9-tetrahydrocannabinol (THC) is the analyte quantified for oral fluid cannabinoid monitoring. The potential for false-positive oral fluid cannabinoid results from passive exposure to THC-laden cann...

    Karl B. Scheidweiler, Sarah K. Himes… in Analytical and Bioanalytical Chemistry (2013)