title: Simultaneous determination of the major acidic metabolites of catecholamines and serotonin in urine by liquid chromatography with electrochemical detection after a one-step sample clean-up on Sephadex G-10; influence of vanilla and banana ingestion.
abstract: A simple method is described for the simultaneous determination of vanilmandelic acid (VMA), 3,4-dihydroxyphenylacetic acid (DOPAC), 5-hydroxyindole-3-acetic acid (5-HIAA) and homovanillic acid (HVA) in urine. The compounds are isolated by a one-step sample clean-up on Sephadex G-10, separated by ion-pair reversed-phase liquid chromatography and detected electrochemically. A single analysis is completed within 65 min. Sample clean-up did not cause losses of the compounds of interest. The detection limits in urine were 0.4, 0.8, 1.0 and 1.6 mumol/l for VMA, DOPAC, 5-HIAA and HVA, respectively. 3,4-Dihydroxymandelic acid and vanillic acid (VA) were also detectable, but, under the chromatographic conditions used, they were not resolved from interfering components. VA and 5-HIAA could be analysed separately in the Sephadex G-10 eluate if more restrictive sampling conditions were used. Ingestion of bananas caused an increase of VMA, DOPAC, 5-HIAA and HVA in 24-h urine. After ingestion of vanilla an increased excretion of VA was observed, while the excretion of VMA, DOPAC and HVA was unaffected.
mesh_terms: D015102:3,4-Dihydroxyphenylacetic Acid / Q000652:urine; D000328:Adult; D001547:Benzaldehydes / Q000378:metabolism*; D002395:Catecholamines / Q000652:urine*; D002851:Chromatography, High Pressure Liquid; D004063:Digestion; D004563:Electrochemistry; D005260:Female; D005502:Food; D005638:Fruit / Q000378:metabolism*; D006719:Homovanillic Acid / Q000652:urine; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000652:urine; D008297:Male; D012701:Serotonin / Q000652:urine*; D012737:Sex Factors; D014642:Vanilmandelic Acid / Q000652:urine
chemical_list: D001547:Benzaldehydes; D002395:Catecholamines; D015102:3,4-Dihydroxyphenylacetic Acid; D012701:Serotonin; D006897:Hydroxyindoleacetic Acid; D014642:Vanilmandelic Acid; C100058:vanillin; D006719:Homovanillic Acid