title: Application of a sodium gradient in dynamic cation-exchange systems for rapid analysis by high-performance liquid chromatography and electrochemical detection of urinary catecholamines after a single purification step with aluminium oxide.
mesh_terms: D000537:Aluminum Oxide; D002395:Catecholamines / Q000302:isolation & purification / Q000652:urine*; D002851:Chromatography, High Pressure Liquid; D002852:Chromatography, Ion Exchange; D004563:Electrochemistry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D012964:Sodium
chemical_list: D002395:Catecholamines; D012964:Sodium; D000537:Aluminum Oxide