ICP-MS DETERMINATION OF ULTRALOW CONTENTS OF URANIUM AND THORIUM IN ANTIQUE LEAD AFTER THEIR ISOLATION BY COUNTERCURRENT CHROMATOGRAPHY (LIQUID-CHROMATOGRAPHY WITH A FREE STATIONARY PHASE)
https://doi.org/10.26896/1028-6861-2018-84-4-12-15
Abstract
A methodical approach to reduction of the limit of uranium and thorium detection in antique lead is proposed. The approach includes separation of the elements in the extraction system based on tetraphenylmethylene diphosphine dioxide and their subsequent ICP-MS determination. The influence of phase contact time, medium acidity, concentration of the extractant on the extraction of uranium and thorium from nitric acid solutions was studied under conditions of batch extraction. It is shown that the matrix element (lead) is not recovered in the considered extraction system. We specified and optimized conditions for concentration of uranium and thorium and their elution with an aqueous solution of etidronic acid using countercurrent chromatography. The content of uranium and thorium in the sample of antique lead raised from the ocean floor are less than 10–10 % wt.
About the Authors
N. N. Fedyunina
National University of Science and Technology «MISIS»
Russian Federation
Russian Federation
Natalia N. Fedyunina
Dubna
P. S. Fedotov
National University of Science and Technology «MISIS»;
V. I. Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences
Russian Federation
Russian Federation
Petr S. Fedotov
Dubna
D. V. Filosofov
Joint Institute for Nuclear Research
Russian Federation
Russian Federation
Dmitry V. Filosofov
Dubna
E. A. Yakushev
Joint Institute for Nuclear Research
Russian Federation
Russian Federation
Evgeny A. Yakushev
Dubna
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Review
For citations:
Fedyunina N.N., Fedotov P.S., Filosofov D.V., Yakushev E.A. ICP-MS DETERMINATION OF ULTRALOW CONTENTS OF URANIUM AND THORIUM IN ANTIQUE LEAD AFTER THEIR ISOLATION BY COUNTERCURRENT CHROMATOGRAPHY (LIQUID-CHROMATOGRAPHY WITH A FREE STATIONARY PHASE). Industrial laboratory. Diagnostics of materials. 2018;84(4):12-15. (In Russ.) https://doi.org/10.26896/1028-6861-2018-84-4-12-15
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