Plutonium(III)-ion selective electrode of liquid membrane type using multidentate phosphine oxide ionophore Original Research Article

Plutonium(III)-ion selective electrode consisting of phosphine oxides such as bis-(diphenylphosphoryl)-methane as an ionophore was developed. Fundamental data, which were utilized for designing the electrode, on the ion transfer of Pu3+ across aqueous (w)/organic (org) solutions interface facilitated by the phosphine oxide derivatives were obtained by ion-transfer polarography at the w/org interface. The Pu(III)-ISE prepared exhibited Nernstian response to the concentration of Pu3+ in the sample solution. Interference of UO2+2, U4+, NpO+2 and Pu4+ was investigated.