title: Spectrophotometric determination of organic cations by solvent extraction with tetrabromophenolphthalein ethyl ester.
mesh_terms: D001966:Bromine; D055598:Chemical Phenomena; D002621:Chemistry; D004155:Diphenhydramine; D004952:Esters; D006571:Heterocyclic Compounds; D006863:Hydrogen-Ion Concentration; D009388:Neostigmine; D010635:Phenolphthaleins; D000644:Quaternary Ammonium Compounds; D012997:Solvents; D013053:Spectrophotometry; D013057:Spectrum Analysis; D013757:Tetraethylammonium Compounds
chemical_list: D004952:Esters; D006571:Heterocyclic Compounds; D010635:Phenolphthaleins; D000644:Quaternary Ammonium Compounds; D012997:Solvents; D013757:Tetraethylammonium Compounds; D009388:Neostigmine; D004155:Diphenhydramine; D001966:Bromine