title: Colorimetric determination of phentolamine.
mesh_terms: D000632:Aminopyrine; D003124:Colorimetry; D005292:Ferricyanides; D008722:Methods; D010646:Phentolamine / Q000032:analysis*; D010656:Phenylephrine
chemical_list: D005292:Ferricyanides; D000632:Aminopyrine; D010656:Phenylephrine; D010646:Phentolamine