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Extraction of thallium and indium isotopes as the homologues of nihonium into the ionic liquids

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Extraction of thallium and indium, as the homologues of nihonium, from HCl solutions into hydrophobic ionic liquids was studied. In the presence of NaClO2 as the oxidizing agent, thallium is effectively extracted into all the tested ionic liquids from 0.2 to 5 M HCl. In absence of NaClO2, thallium extraction strongly depends on the HCl concentration and no extraction of indium was observed. Using [C6mim][NTf2] and [Tbma][NTf2], the thallium/indium separation factors SF(Tl/In) > 4 × 104 can be achieved. Hence, the system with NaClO2 oxidizing agent can be considered a candidate for the future studies of nihonium chemical properties.

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This work was carried out within CANAM infrastructure project LM2015056 and within the Center for advanced applied science, Project Number CZ.02.1.01/0.0/0.0/16_019/0000778, both supported by the Ministry of Education, Youth and Sports of the Czech Republic.

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Correspondence to Katerina Cubova.

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Cubova, K., Semelova, M., Nemec, M. et al. Extraction of thallium and indium isotopes as the homologues of nihonium into the ionic liquids. J Radioanal Nucl Chem 318, 2455–2461 (2018).

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