Graphene oxide (GO) has two important characteristics: (I) it can be produced by cost-effective chemical methods, and (II) it is highly hydrophilic and can form stable aqueous colloids to facilitate the assembly of macroscopic structures by simple and cheap solution processes. In this work, the possibility of using of GO and GO modified by Mn and Fe have been examined. In order to find potential separation possibilities of prepared sorbents, their extraction behaviour was investigated by batch equilibration technique with use of radioactive tracers or multielemental standards in dependence on pH at room temperature. The sorption of individual elements strongly depend on the pH. In acidic solution, only few elements show the affinity to prepared sorbents: Pa-233, Au, Mo, Ni. Alkali metals are not retained on the resins under all pH conditions. The dependence on the ionic strange was also checked- no influence for the sorption behavior was observed. Obtained results have been verified by column experiments. Due to small dimensions of nanoparticles, there are great difficulties with column preparation.
These sorbents have found application for the separation, preconcentration and determination of Am-241, Co-60, Eu-152, Ba-133 from aqueous solutions.
Also, the analytical procedure for the determination of trace amounts of Pt in tissues and body fluids by RNAA, with the separation of Au-199 on GO-Mn sorbent, was proposed.