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Determination of the oxygen-to-uranium ratio in uranium dioxide by differential-pulse polarography

✍ Scribed by Vijaya Rammohan; R.B. Yadav; C.K. Ramamurty; S. Syamsundar

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 370 KB
Volume: 264
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(92)85310-3

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✦ Synopsis

A dlfferentlal-pulse polarographlc method for the determmatlon of non-stolchlometry m uramum dloxlde powders and pellets 1s described The method IS based on the dlssolutlon of the sample m 2 M sulphunc acid-hydrofluorlc acid under an mert atmosphere and subsequent determmatlon of uranmm(VI) by dtierentlal-pulse polarography and uranmm(IV) by redox tltnmetry Uranmm(VI) IS reduced at a dropping mercury electrode at a peak potential of -0 20 vs SCE Tbe measurement of uranmm(VI) 1s done with a drop time of 1 s and a pulse amplitude of 100 mV Reproduclblhtles of 0 0002 O/U ratlo for UOz pellets and 0 002 O/U ratio for UO, powders were achieved

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