title: Organic acids in urine: sample preparation for GC/MS.
mesh_terms: D000143:Acids / Q000652:urine*; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D008661:Metabolism, Inborn Errors / Q000652:urine*; D008764:Methylmalonic Acid / Q000652:urine; D011422:Propionates / Q000652:urine
chemical_list: D000143:Acids; D011422:Propionates; D008764:Methylmalonic Acid; C029658:propionic acid