Uranium-sensitive electrodes based on the uranium—di(octylphenyl)phosphate complex as sensor and alkyl phosphate as mediator in a PVC matrix membrane

Abstract

The properties of uranium-sensitive electrodes based on membranes containing uranium di-(4-octylphenyl)phosphate as sensor have been determined, in presence of different phosphates as mediators. The electrode prepared from tritolyl phosphate as mediator was found to give a response of 30 mV/decade over a range of uranium concentration. Interference by Sr 2+, Ba 2+, Ca 2+ and F − was also studied, by the mixed solution method. Fluoride interferes severely, by complexation of the UO 2+ 2 ion.