Rimoldi, M A new stable-isotope dilution method for measurement of orotic acid utilizing solvent-extracted urine. [electronic resource] - Journal of inherited metabolic disease 1994 - 243-4 p. digital Publication Type: Journal Article ISSN: 0141-8955 Standard No.: 10.1007/BF00711626 doi Subjects--Topical Terms: Furans--bloodGas Chromatography-Mass SpectrometryHumansNitrogen RadioisotopesOrotic Acid--urineRadioisotope Dilution Technique