Voltammetric Study on Ion Transfer of Uranium(VI) Ion between Aqueous and Nitrobenzene Phases in the Presence of Bis(diphenylphosphoryl)methane

Autor: Sorin Kihara, Yoshihiro Kitatsuji, Zenko Yoshida, Hisao Aoyagi
Rok vydání: 1998
Předmět:
Zdroj: Analytical Sciences. 14:67-70
ISSN: 1348-2246
0910-6340
DOI: 10.2116/analsci.14.67
Popis: The ion transfer of UO22+ ion across an aqueous(w)/nitrobenzene(NB) interface was investigated by ion-transfer polarography using an aqueous electrolyte dropping electrode. It was found that the transfer of UO22+ from w to NB was facilitated by bis(diphenylphosphoryl)methane (BDPPM), and that the transfer reaction had irreversible characteristics. A potential generated at the UO22+ ion-selective electrode, which was prepared while referring to ion transfer data, revealed a reversible Nernstian response against the concentration of the UO22+ ion in an aqueous sample solution. The irreversible nature of the UO22+ transfer observed in the polarogram resulted from such slow processes involved in the ion transfer reaction as the adsorption/desorption of BDPPM or the UO22+-BDPPM complex at the w/NB interface. The feasibility of the electrolytic separation of uranium from neptunium and plutonium on the basis of a selective ion-transfer reaction is discussed.
Databáze: OpenAIRE
Externí odkaz: