Potentiometric determination of plutonium by sodium bismuthate oxidation.
A potentiometric method for the determination of plutonium is described, in which the plutonium is quantitatively oxidized to plutonium(VI) with sodium bismuthate in nitric acid medium, the excess of oxidant is destroyed chemically and plutonium(VI) is reduced to plutonium(IV) with a measured excess of iron(II), the surplus of which is back-titrated with dichromate. For 3-5 mg of plutonium the error is less than 0.2%. For submilligram quantities of plutonium in presence of macro-amounts of uranium the error is below 2.0%.
Charyulu
M M
MM
Radiochemistry Division Bhabha Atomic Research Centre Trombay, Bombay-400085, India.
Rao
V K
VK
Natarajan
P R
PR