title: The stability of tryptophan metabolites prior to urine analysis.
abstract: A method for the quantitative preservation of tryptophan metabolites is described. Analysis of the samples was done by reversed phase HPLC. Results both for a standard solution and biological samples (urine are presented.
mesh_terms: D006916:5-Hydroxytryptophan / Q000652:urine; D000818:Animals; D002851:Chromatography, High Pressure Liquid; D003080:Cold Temperature; D004355:Drug Stability; D006801:Humans; D006863:Hydrogen-Ion Concentration; D006897:Hydroxyindoleacetic Acid / Q000652:urine; D007210:Indoleacetic Acids / Q000652:urine; D007736:Kynurenic Acid / Q000652:urine; D007737:Kynurenine / Q000652:urine; D051381:Rats; D012701:Serotonin / Q000652:urine; D014364:Tryptophan / Q000652:urine*
chemical_list: D007210:Indoleacetic Acids; D012701:Serotonin; D007737:Kynurenine; D006897:Hydroxyindoleacetic Acid; D014364:Tryptophan; D006916:5-Hydroxytryptophan; D007736:Kynurenic Acid