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Hydrophilic interaction liquid chromatography–tandem mass spectrometry (HILIC-MS/MS) determination of cocaine and its metabolites benzoylecgonine, ecgonine methyl ester, and cocaethylene in hair samples

Hair SamplesGas ChromatographyMedicineBioanalysisForensic ToxicologyMass SpectrometryDrug TestAnalytical ChemistryForensic ChemistryLiquid ChromatographyPharmacologyEcgonine Methyl EsterChromatographyDrug Analysis