Original scientific paper

Polarographic Determination of Potassium in Uranium Compounds

B . Tomažić ; Department of Physical Chemistry, Institute »Ruder Boskovic, Zagreb, Croatia, Yugoslavia
M. Branica ; Department of Physical Chemistry, Institute »Ruder Boskovic, Zagreb, Croatia, Yugoslavia

Abstract

The A. C. polarographic method is proposed for the determination
of potassium in precipitates of the system: uran yl nitratepotassium
hydroxide-potassium nitrate. Samples containing potassium
and uranium were dissol ved in 4 M nitric acid, present
u ranium was r emoved by continuous extraction with tetrahydropyrane.
After mineralization with concentrated nitric ac id and
hydrogen peroxide, the samples were dissolved in supporting e l ectrolyte:m0.075 M tetramethylammonium hydroxide and 0.075 NI tetramethylammonium chloride. From 2.8 to 28 μg of potassium per ml.
could be determined with a standard error of 0.4 ~tg K/ml. The
l owest gramatomic ratio K/U was 3.5 X 10-5 i. e. 5.6 ppm of K in U.

Keywords

Hrčak ID:

208198

URI

https://hrcak.srce.hr/208198

Publication date:

31.3.1966.

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