title: Colorimetric determination of some organic bases using Tropaeolin 000.
mesh_terms: D001391:Azo Compounds; D003124:Colorimetry / Q000379:methods; D004159:Diphenylamine / Q000031:analogs & derivatives; D004809:Ephedrine / Q000032:analysis; D008774:Methylphenidate / Q000032:analysis; D009552:Nikethamide / Q000032:analysis; D014149:Tranquilizing Agents / Q000032:analysis*
chemical_list: D001391:Azo Compounds; D014149:Tranquilizing Agents; D008774:Methylphenidate; D009552:Nikethamide; D004159:Diphenylamine; D004809:Ephedrine