Determination of homovanillic, isohomovanillic and vanillylmandelic acids in human urine by means of glass capillary gas-liquid chromatography with temperature-programmed electron-capture detection.
The determination of urinary homovanillic, isohomovanillic and vanillylmandelic acids as their trifluoroacetylhexafluoroisopropyl ester derivatives by glass capillary gas-liquid chromatography has been studied. It was shown that even with high column efficiencies a single peak-single compound relationship could not be assumed and for reliable quantitation it was necessary to check determinations with a second gas-liquid chromatography column.
D002849:Chromatography, Gas / Q000379:methods*; D006719:Homovanillic Acid / Q000652:urine*; D006801:Humans; D010648:Phenylacetates / Q000652:urine*; D014642:Vanilmandelic Acid / Q000652:urine*
D010648:Phenylacetates; C021208:isohomovanillic acid; D014642:Vanilmandelic Acid; D006719:Homovanillic Acid