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