caa a22 4500 465731937 CHVBK 20180323111744.0 cr unu---uuuuu 170327e19900401xx s 000 0 eng 10.1007/BF02061811 doi (NATIONALLICENCE)springer-10.1007/BF02061811 Effect of excess AgO and EDTA on the redox titration involved in potentiometric determination of plutonium [Elektronische Daten] [S. Hasilkar, Keshav Chander, S. Marathe] Attempts to carry out potentiometric determination of plutonium (by AgO-oxidation method) following the determination of thorium (by complexometric EDTA titration) gave positively biased irreproducible values of plutonium. In order to understand the factors leading to the erroneous values of plutonium, the effect of varying amounts of AgO and EDTA on redox [Fe(II)/K2Cr2O7] titration in the medium consisting of 1M H2SO4 and 0,4M HNO3 was studied. When AgO (up to 200 mg) was added in the titration medium and destroyed by sulfamic acid prior to the redox titration, the dichromate tittre value (amount of standard K2Cr2O7 solution equivalent to 1 g of Fe(II) solution) showed negative bias. The bias was found to decrease with increase in time interval between AgO destruction and the redox titration. The presence of EDTA (up to 15 mg) gave positive bias in the titre value. Results on the titre values obtained under different conditions of the aqueous medium indicated the possibility of formation of unstable Ag(II)-sulfamic acid compled, which is probably responsible for the irreproducible values of plutonium. Akadémiai Kiadó, 1990 Hasilkar S. Fuel Chemistry Division, Bhabha Atomic Research Centre, Trombay, 400 085, Bombay, (India) aut Chander Keshav Fuel Chemistry Division, Bhabha Atomic Research Centre, Trombay, 400 085, Bombay, (India) aut Marathe S. Fuel Chemistry Division, Bhabha Atomic Research Centre, Trombay, 400 085, Bombay, (India) aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 139/2(1990-04-01), 263-271 0236-5731 139:2<263 1990 139 10967 https://doi.org/10.1007/BF02061811 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02061811 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hasilkar S. Fuel Chemistry Division, Bhabha Atomic Research Centre, Trombay, 400 085, Bombay, (India) aut NATIONALLICENCE 700 1- Chander Keshav Fuel Chemistry Division, Bhabha Atomic Research Centre, Trombay, 400 085, Bombay, (India) aut NATIONALLICENCE 700 1- Marathe S. Fuel Chemistry Division, Bhabha Atomic Research Centre, Trombay, 400 085, Bombay, (India) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 139/2(1990-04-01), 263-271 0236-5731 139:2<263 1990 139 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer