Development of the novel fluorescent probe selective for uranyl ion for capillary electrophoresis-laser induced fluorescence detection

Sato, Yoshiyuki; Saito, Shingo*; Haraga, Tomoko   ; Ito, Yuki*; Kameo, Yutaka ; Takahashi, Kuniaki ; Shibukawa, Masami*

In this research, capillary electrophoresis-laser induced fluorescence detecting method (CE-LIF) as a simple and rapid analytical method for uranyl ion was studied. In order to detect uranyl ion by CE-LIF, the novel fluorescent probe whose chelating group was phenanthroline dicarboxylic acid, was synthesized. This planer tetradenate probe forms a stable complex with uranyl ion. And this complex had strong fluorescence to suppress the quenching of the ligand-centered emission. This complex was applied for CE-LIF and investigated in order to separate from other metal ions. As a result, uranyl ion formed an inert complex and was detected successfully. Furthermore an uranyl ion was separated from coexistence metal ions, such as Ca, Fe, Al and lanthanide ions, and a lower detection limit of tens ppt revel for uranyl ion was successfully.