An on-line method developed for separating plutonium and americium was developed. The method is based on the use of HPLC pump
with three analytical chromatographic columns. Plutonium is reduced throughout the procedure to trivalent oxidation state,
and is recovered in the various separation steps together with americium. Light lanthanides and trivalent actinides are separated
with TEVA resin in thiocyanate/formic acid media. Trivalent plutonium and americium are pre-concentrated in a TCC-II cation-exchange
column, after which the separation is performed in CS5A ion chromatography column by using two different eluents. Pu(III)
is eluted with a dipicolinic acid eluent, and Am(III) with oxalic acid eluent. Radiochemical and chemical purity of the eluted
plutonium and americium fractions were ensured with alpha-spectrometry.