[en] Systematic studies are carried out on the distribution of Pu(IV), Am(III) and Cm(III) from nitric acid media using solid (Dowex) and liquid (TCMA) anion exchangers. The distribution of these elements from nitric acid-organic solvent mixtures is also investigated. It can be concluded that both Dowex 1X8 and TCMA are convenient for quantitative adsorption or extraction of Pu(IV) from pure solutions of nitric acid as well as from its mixtures with water-miscible organic solvents. Plutonium(IV) can be easily separated from Am(III) and Cm(III) in working solutions of intermediate concentrations of nitric acid using Dowex 1X8. The mutual separation of Am(III) and Cm(III) may also be achieved by using the forementioned techniques of ion exchange and solvent extraction. The influence of organic additives on the course of distribution is found to be more pronounced in case of solid anion exchangers than that of liquid ones. The addition of water-miscible organic solvents makes the separation possible at low acid concentrations. (T.G.)