caa a22 4500 37886758X CHVBK 20180305123401.0 cr unu---uuuuu 161128e20030401xx s 000 0 eng 10.1524/ract.91.4.191.19969 doi (NATIONALLICENCE)gruyter-10.1524/ract.91.4.191.19969 Redox speciation method for neptunium in a wide range of concentrations [Elektronische Daten] [A. Kirishima, O. Tochiyama, K. Tanaka, Y. Niibori, T. Mitsugashira] The adsorption method for determination of the distribution of neptunium among its oxidation states by the use of solvent impregnated resins and bismuth phosphate precipitates as adsorbents is described. For neptunium in concentration ranging from ∼10-10 to ∼10-2.5M, Np(IV) and Np(VI) were quantitatively adsorbed on the impregnated resin in a solution of the acidity 1.0-0.1M HClO4, while Np(V) remained in the liquid phase. In the same condition, the precipitate of bismuth phosphate absorbed Np(IV) selectively, leaving Np(V) and Np(VI) in the liquid phase. By carrying out these adsorption methods in Ultrafree-MC Microporous Centrifugal Filter Units (Millipore Corporation), the oxidation state distribution of neptunium in acid solution can be determined in a simple manner with a small sample volume (500μl) regardless of its concentration. © 2003 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Kirishima A. aut Tochiyama O. aut Tanaka K. aut Niibori Y. aut Mitsugashira T. aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/4/2003(2003-04-01), 191-196 0033-8230 91:4/2003<191 2003 91 ract https://doi.org/10.1524/ract.91.4.191.19969 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.91.4.191.19969 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kirishima A. aut NATIONALLICENCE 700 1- Tochiyama O. aut NATIONALLICENCE 700 1- Tanaka K. aut NATIONALLICENCE 700 1- Niibori Y. aut NATIONALLICENCE 700 1- Mitsugashira T. aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/4/2003(2003-04-01), 191-196 0033-8230 91:4/2003<191 2003 91 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter