A SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF THE OXYGEN TO METAL RATIO IN U3O8

Authors
SREENIVASAN NL SRINIVASAN TG RAO PRV
Citation
Nl. Sreenivasan et al., A SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF THE OXYGEN TO METAL RATIO IN U3O8, Journal of radioanalytical and nuclear chemistry, 188(6), 1994, pp. 463-470
Citations number
12
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Analytical","Nuclear Sciences & Tecnology
Journal title
Journal of radioanalytical and nuclear chemistry → ACNP
ISSN journal
02365731
Volume
188
Issue
6
Year of publication
1994
Pages
463 - 470
Database
ISI
SICI code
0236-5731(1994)188:6<463:ASMFTD>2.0.ZU;2-F
Abstract
A fast and accurate method for the determination of oxygen to metal ra tio (O/M) in U3O8 is described. The method involves dissolution of the sample in 85% phosphoric acid containing sulfate ions and measurement of the U(IV) absorbance directly and after reducing the U(VI) in the sample to U(IV) with Fe(II). The O/M is calculated from the ratio of t he two absorbances. Elaborate calibrations for U(IV) and U(VI) are avo ided and the sample requirement is a minimum. The method gives the oxy gen to metal ratio with an accuracy better than +/-0.004 O/M units and precision better than +/-0.004 O/M units.