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Rapid analysis of porphyrins at low ng/l and μg/l levels in human urine by a gradient liquid chromatography method using octadecylsilica monolithic columns

Human UrineMedicineOctadecylsilica Monolithic ColumnsBioanalysisChromatographic AnalysisAnalytical ChemistryLiquid ChromatographyClinical ChemistryChromatographyPharmacologyLow Ng/lPorphyrias