title: Potentiometric and indicator titrations of barbiturates and sulfa drugs in tetramethyl-urea.
mesh_terms: D001463:Barbiturates / Q000032:analysis*; D007202:Indicators and Reagents; D011199:Potentiometry; D013449:Sulfonamides / Q000032:analysis*; D014508:Urea / Q000032:analysis
chemical_list: D001463:Barbiturates; D007202:Indicators and Reagents; D013449:Sulfonamides; D014508:Urea