title: Assay of urinary vanilmandelic, homovanillic, and 5-hydroxyindole acetic acids by liquid chromatography with electrochemical detection.
abstract: A reversed-phase liquid chromatographic method with amperometric detection has been developed for the simultaneous determination of the noradrenaline metabolite, vanilmandelic acid, the dopamine metabolite, homovanillic acid, and the serotonin metabolite, 5-hydroxyindole acetic acid, in human urine. After purification by an extraction procedure, the metabolites were rapidly separated under isocratic conditions. Detection and quantification were performed with an electrochemical detector using a carbon paste electrode. The present method is sensitive, selective and, achieves a high degree of precision by the use of isovanilmandelic acid as an internal standard. This provides a suitable tool for clinical and research applications.
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004563:Electrochemistry; D006719:Homovanillic Acid / Q000652:urine*; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000652:urine*; D010648:Phenylacetates / Q000652:urine*; D014642:Vanilmandelic Acid / Q000652:urine*
chemical_list: D010648:Phenylacetates; D006897:Hydroxyindoleacetic Acid; D014642:Vanilmandelic Acid; D006719:Homovanillic Acid