title: Determination of drugs in dosage forms by difference spectrophotometry.
mesh_terms: D000468:Alkalies; D004304:Dosage Forms; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D008701:Methapyrilene / Q000032:analysis; D004364:Pharmaceutical Preparations / Q000032:analysis*; D011729:Pyridostigmine Bromide / Q000032:analysis; D011736:Pyridoxine / Q000032:analysis; D012545:Schiff Bases; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013432:Sulfathiazoles / Q000032:analysis; D013843:Thiazines / Q000032:analysis
chemical_list: D000468:Alkalies; D004304:Dosage Forms; D004364:Pharmaceutical Preparations; D012545:Schiff Bases; D013432:Sulfathiazoles; D013843:Thiazines; D008701:Methapyrilene; D011736:Pyridoxine; D011729:Pyridostigmine Bromide