title: AN OBSERVATION CONCERNING THE BRATTON-MARSHALL DIAZO REACTION IN SULFONAMIDE-FREE URINE.
mesh_terms: D001391:Azo Compounds; D001826:Body Fluids; D002623:Chemistry Techniques, Analytical; D012106:Research; D000077145:Sulfanilamide; D013424:Sulfanilamides; D013449:Sulfonamides; D014556:Urine
chemical_list: D001391:Azo Compounds; D013424:Sulfanilamides; D013449:Sulfonamides; D000077145:Sulfanilamide
keywords: AZO COMPOUNDS; CHEMISTRY, ANALYTICAL; EXPERIMENTAL LAB STUDY; SULFONAMIDES; URINE