title: Separation and determination of urinary homovanillic acid and iso-homovanillic acid by gas-liquid chromatography and electron capture detection.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002849:Chromatography, Gas; D003401:Creatine / Q000652:urine; D004295:Dihydroxyphenylalanine / Q000627:therapeutic use; D006719:Homovanillic Acid / Q000302:isolation & purification / Q000652:urine; D006801:Humans; D008722:Methods; D008875:Middle Aged; D009447:Neuroblastoma / Q000652:urine; D010300:Parkinson Disease / Q000188:drug therapy / Q000652:urine; D010648:Phenylacetates / Q000652:urine*
chemical_list: D010648:Phenylacetates; D004295:Dihydroxyphenylalanine; D003401:Creatine; D006719:Homovanillic Acid