Sign in to download full-size image Fig. 9.13. Preconcentration of ultra-trace plutonium and step-elution of Th, U, Pu using CCC. GS-20A multilayer coil partition centrifuge machine, 0.4 < β < 0.74; Vc = 30.5 ml; stationary phase; 20% tri-n-octylamine in toluene; Vs = 15 ...