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Rapid, simultaneous and nanomolar determination of pyroglutamic acid and cis-/trans-urocanic acid in human stratum corneum by hydrophilic interaction liquid chromatography (HILIC)–electrospray ionization tandem mass spectrometry

Human Stratum CorneumBiochemistryMedicineBioanalysisMass SpectrometryAnalytical ChemistryLiquid ChromatographyDermatologyChromatographic AnalysisPharmacologyPyroglutamic AcidChromatographyDrug Analysis