Blood Chemical AnalysisLimit of DetectionTandem Mass SpectrometryChromatography, LiquidGas Chromatography-Mass SpectrometrySubstance Abuse DetectionChromatography, High Pressure LiquidChemistry, ClinicalSolid Phase ExtractionCalibrationReproducibility of ResultsReference StandardsSpectrometry, Mass, Electrospray IonizationElectrophoresis, CapillaryImmunoassayChromatography, Micellar Electrokinetic CapillaryBiosensing TechniquesSensitivity and SpecificityElectrophoresis, MicrochipAutoanalysisBlood Specimen CollectionQuality ControlSpecimen HandlingSolid Phase MicroextractionChemistry Techniques, AnalyticalAnalytic Sample Preparation MethodsMorphine DerivativesIndicators and ReagentsMass SpectrometryAntibodies, ImmobilizedUrinalysisElectrolytesElectrochemical TechniquesMeconiumDrug StabilityAcetonitrilesNarcoticsForensic MedicinePharmaceutical PreparationsDrug ResiduesClinical Chemistry TestsLiquid Phase MicroextractionReference ValuesOxygen CompoundsForensic ToxicologyAtmospheric PressureLiquid-Liquid ExtractionCodeineMaternal Serum Screening TestsBiological MarkersFlow Injection AnalysisProcyclidine3,4-MethylenedioxyamphetamineChromatography, Reverse-PhaseMicrochemistryCapillary ElectrochromatographyFlame IonizationOrganic ChemicalsElectrochemistryOpiate AlkaloidsMicrofluidic Analytical TechniquesPesticide ResiduesMicrochip Analytical ProceduresLaboratoriesClinical Laboratory TechniquesHairPaperAmphetaminesVeterinary DrugsSpectrophotometry, UltravioletDimethylpolysiloxanesNanotechnologyMethanolChromatography, GasBlood ProteinsSolventsEnvironmental MonitoringSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationCocaineSerumEstriolIonsElectrodesSalivaMolecular StructureStereoisomerismAnabasineTrimethylsilyl CompoundsPlasmaChemistry, OrganicMicrofluidicsPesticidesBuffersGlycosuriaSweatHeroinLinear ModelsChemical FractionationMetanephrineDried Blood Spot Testing