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Simultaneous determination of barbiturates in human biological fluids by direct immersion solid-phase microextraction and gas chromatography–mass spectrometry

Gas Chromatography–mass SpectrometryGas ChromatographySample PreparationHuman Biological FluidsMedicineBioanalysisMass SpectrometryBiological Mass SpectrometryAnalytical ChemistrySimultaneous DeterminationLiquid ChromatographyChromatographic AnalysisPharmacologyChromatographyDrug Analysis