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Determination of urinary and plasma dihydroxyphenylalanine by coupled-column high-performance liquid chromatography with C8 and C18 stationary phases

UrologyBiochemistryPlasma DihydroxyphenylalanineSeparation ScienceGas ChromatographyBioanalysisAnalytical ChemistryLiquid ChromatographyClinical ChemistryChromatographic AnalysisMedicineC18 Stationary PhasesChromatographyDrug Analysis