title: Deficiencies of sigma diagnostic's urinary oxalate method in the presence of ascorbate.
mesh_terms: D001205:Ascorbic Acid / Q000652:urine*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents / Q000592:standards; D010070:Oxalates / Q000652:urine*
chemical_list: D007202:Indicators and Reagents; D010070:Oxalates; D001205:Ascorbic Acid