The dynamics of the Ce distribution in a nonequilibrium extraction pro
cess are investigated. Results are presented for the extraction of Ce
by tributylphosphate in organic diluents from an aqueous solution in w
hich a Belousov-Zhabotinskii oscillating reaction is occurring. The ti
me dependences of [Ce] in the organic phase of the oscillatory extract
ion system that are synchronous with the redox-potential dependences a
re obtained for the first time. The effect of the initial concentratio
ns of Ce, oxidant, and organic substrate on the principal parameters o
f the oscillatory extraction, such as the frequency, amplitude, etc.,
is found. A conclusion is made about the ability to central an oscilla
tory extraction process.