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Accurate measurement of free carnitine in dried blood spots by isotope-dilution electrospray tandem mass spectrometry without butylation

Free CarnitineAnalytical InstrumentationBiochemistryGas ChromatographyDried Blood SpotsMedicineBioanalysisMass SpectrometryAnalytical ChemistryLiquid ChromatographyClinical ChemistryChromatographic AnalysisPharmacologyAccurate MeasurementChromatography