caa a22 4500 465730949 CHVBK 20180323111741.0 cr unu---uuuuu 170327e19900601xx s 000 0 eng 10.1007/BF02039513 doi (NATIONALLICENCE)springer-10.1007/BF02039513 Monooctyl-α-(4-carboxyanilino)benzylphosphonic acid as a new reagent for extraction and separation of lead(II) and bismuth(III) [Elektronische Daten] [V. Živčić, M. Herak] Monooctyl-α-(4-carboxyanilino)benzylphosphonic acid (H2L) was investigated as a novel reagent for the extraction and separation of lead(II) and bismuth(III) from nitrate solutions. Stoichiometric ionization constants of H2L in ethanol — water mixtures determined by potentiometric NaOH titration had values pKa1 2.25 and pKa2 4.33. Ethanol and chloroform solutions of H2L followed Beer's law at 300 nm and 296 nm, molar absorptivities being 2.94·104 mol−1·l·cm−1 and 2.85·104 mol−1·l·cm−1, respectively. HNO3 and HCl were also extracted into chloroform solutions containing H2L. Bismuth(III) was quantitatively transferred into the chloroform H2L solution at pH 1, and lead(II) at 3.5. The value of the separation factor DBi/DPb is 160 at pH 1. Akadémiai Kiadó, 1990 Živčić V. Laboratory of Analytical Chemistry, Faculty of Science, University of Zagreb, Zagreb, (Yugoslavia) aut Herak M. Laboratory of Analytical Chemistry, Faculty of Science, University of Zagreb, Zagreb, (Yugoslavia) aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 140/2(1990-06-01), 409-414 0236-5731 140:2<409 1990 140 10967 https://doi.org/10.1007/BF02039513 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02039513 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Živčić V. Laboratory of Analytical Chemistry, Faculty of Science, University of Zagreb, Zagreb, (Yugoslavia) aut NATIONALLICENCE 700 1- Herak M. Laboratory of Analytical Chemistry, Faculty of Science, University of Zagreb, Zagreb, (Yugoslavia) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 140/2(1990-06-01), 409-414 0236-5731 140:2<409 1990 140 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer