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Gas chromatography-isotope dilution mass spectrometry preceded by liquid–liquid extraction and chemical derivatization for the determination of ketamine and norketamine in urine

Chemical DerivatizationGas ChromatographyMedicineDrug PurityForensic ToxicologyMass SpectrometryLiquid–liquid ExtractionAnalytical ChemistryLiquid ChromatographyClinical ChemistryChromatographic AnalysisPharmacologyChromatographyDrug Analysis