title: Separation of the catecholamine metabolites 4-hydroxy-3-methoxy- and 3-hydroxy-4-methoxymandelic acid by reversed-phase high performance liquid chromatography.
abstract: The catecholamine metabolites 4-hydroxy-3-methoxy- and 3-hydroxy-4-methoxymandelic acid can be completely separated by reversed-phase high performance liquid chromatography with chemically bonded octadecylsilane as stationary phase and a citrate/ammonium phosphate buffer (pH 4.5) containing 8% methanol as mobile phase. The two isomers can be electrochemically detected and produce different hydrodynamic voltammograms.
mesh_terms: D002395:Catecholamines / Q000378:metabolism*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004563:Electrochemistry; D006801:Humans; D007536:Isomerism; D014642:Vanilmandelic Acid / Q000302:isolation & purification*
chemical_list: D002395:Catecholamines; D014642:Vanilmandelic Acid