Abstract
For the system liquid anion-exchanger—Cr(III)−NCS−, an investigation has been made of the dependence of the percentage extraction of Cr(III) on parameters such as standing time of the Cr(III)−NCS− solution, temperature, pH and type of exchanger. Quantitative extraction of e.g. 4·10−4 M Cr(III) by 0.1M Aliquat in CCl4 is easily achieved at room temperature, using 4.75M KNCS−0.05N HCl as aqueous phase. At high Cr(III) concentrations, the complex anion present in the organic phase is Cr(NCS) 3−6 ; when working with dilute metal ion solutions, the species extracted is Cr(NCS)4 (H2O) −2 . Separations of mixtures containing 10−2−10−4 M Co(II), Ni(II) and Cr(III) have successfully been accomplished.
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N. BJERRUM, Z. Anorg. Chem., 118 (1921) 131.
N. BJERRUM, Z. Anorg. Chem., 119 (1921) 39, 54, 179.
G. BAGLIANO, L. OSSICINI, M. LEDERER, J. Chromatogr., 21 (1966) 471.
R.J.T. GRAHAM, A. CARR, J. Chromatogr., 46 (1970) 301.
U.A.Th. BRINKMAN, G. DE VRIES, R. JOCHEMSEN, G.J. DE JONG, J. Chromatogr., 102 (1974) 309.
B.E. McCLELLAN, M.K. MEREDITH, R. PARMELEE, J.P. BECK, Anal. Chem., 46 (1974) 306.
R. FOSTER, Chem. Ind. (London), (1960) 1354.
A. WAKSMUNDZKI, S. PRZESZLAKOWSKI, Stationary Phase in Paper and Thin-layer Chromatography, K. MACEK and I.M. HAIS (Eds) Elsevier, Amsterdam, 1965, p. 199.
M.L. GOOD, S.E. BRYAN, F.F. HOLLAND, G.J. MAUS, JR., J. Inorg. Nucl. Chem., 25 (1963) 1167.
B. CHU, R.M. DIAMOND, J. Phys. Chem., 63 (1959) 2021.
J.M. WHÏTE, P. KELLEY, N.C. LI, J. Inorg. Nucl. Chem., 16 (1961) 337.
D. MAYDAN, Y. MARCUS, J. Phys. Chem., 67 (1963) 987.
C.K. JØRGENSEN, Absorption Spectra and Chemical Bonding in Complexes, Pergamon, Oxford, 1962, p. 290.
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De Jong, G.J., Brinkman, U.A.T. The extraction of Cr(III) from aqueous thiocyanate solutions and its separation from Co(II) and Ni(II). J. Radioanal. Chem. 35, 223–232 (1977). https://doi.org/10.1007/BF02518229
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DOI: https://doi.org/10.1007/BF02518229