The plutonium determination by alpha-particle spectrometry with semiconductor detectors in the presence of uranium has been
described. It has been found that plutonium as well as uranium can be electrodeposited quantitatively on nickel or stainless
steel discs from solutions in isopropanol. The time of deposition does not exceed 35–40 min. The determination of plutonium
is possible within the uranium to plutonium weight ratio of 4000 with the accuracy better than 2%.