ИСТИНА

Electroanalytical characteristics have been studied for an ion-selective electrode (ISE) with a membrane based on a supramolecular polymer composition containing polyvinyl chloride (PVC), a plasticizer o-nitrophenyloctyl ether, ionophor tetradecyammonium teraphertehtetate (PTTDF) and a lipophilic dopant tetraphenylborate tetradecylmonium. The electrode function of these ISEs was shown to be linear in the concentration range (TcO4)- or (ReO4)- 210-7÷ 10-2 mol / l; the slopes of the electrode function at 20 ° C are 57.5 ± 1.5 mV / p TcO4 - and 57.4 ± 1.3 mV / p ReO4 -. The potentiometric coefficients of selectivity to various anions are determined. It was established that a change in the pH of the analyzed solution from 0.5 to 13 does not affect the potential. The possibility of using the ISE to determine Tc in the products of reprocessing spent nuclear fuel (SNF) is shown.