title: Two spectrophotometric methods compared for measuring low concentrations of ascorbate in plasma and urine.
mesh_terms: D001205:Ascorbic Acid / Q000032:analysis* / Q000097:blood / Q000652:urine; D001322:Autoanalysis; D006801:Humans; D010659:Phenylhydrazines; D010772:Phosphotungstic Acid; D013053:Spectrophotometry / Q000379:methods
chemical_list: D010659:Phenylhydrazines; D010772:Phosphotungstic Acid; C004787:2,4-dinitrophenylhydrazine; D001205:Ascorbic Acid