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Extraction of thallium with cesium dicarbollylcobaltate in the presence of 18-crown-6

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Abstract

From extraction experiments with 137Cs as a tracer, theextraction constant corresponding to the equilibrium Tl+ (aq)+CsL+ (nb) TlL + (nb) + Cs + (aq) taking place ina two-phase water-nitrobenzene system (L = 18-crown-6; aq = aqueous phase,nb = nitrobenzene phase) was determined as log K ex (Tl+ , CsL+ ) = 1.50.1. Further, the stability constant of the complex TlL+ in nitrobenzene saturated with water was evaluated for a temperatureof 25 °C: log ß nb (TIL+ ) = 9.20.1. Finally, the individualextraction constant of the TlL+ species in the water–nitrobenzenesystem corresponding to the equilibrium TlL + (aq) TlL + (nb)was calculated as log K TIL + i = 2.50.1.

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  1. Department of Analytical Chemistry, Prague Institute of Chemical Technology, Technická 5, 166 28, Prague 6, Czech Republic

    P. Vaňura

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  1. P. Vaňura
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Vaňura, P. Extraction of thallium with cesium dicarbollylcobaltate in the presence of 18-crown-6. Journal of Radioanalytical and Nuclear Chemistry 250, 169–171 (2001). https://doi.org/10.1023/A:1013259703112

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