Abstract
A simple, sensitive and selective method for solvent extraction and spectrophotometric determination of lanthanum(III), praseodymium(III), neodymium(III) and samarium(III) is described. The rare earth metals are extractable into chloroform solution of N-phenylbenzohydroxamic acid (PBHA) at pH9–10. Various parameters are studied to optimize the extraction conditions. Stoichiometry of the complexes and the effect of various ions is discussed. The molar absorptivity is found to increase from 65,000 to 93,000 1·mol−1· cm−1 with the increase in atomic number of the rare earths. The stability constants of the complexes, separation factors and pH5 0 are discussed.
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Thomaskutty, P.T., Agrawal, Y.K. Separation and microdetermination of rare earth metals with N-phenylbenzohydroxamic acid and Xylenol Orange. Journal of Radioanalytical and Nuclear Chemistry, Articles 116, 365–374 (1987). https://doi.org/10.1007/BF02035781
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DOI: https://doi.org/10.1007/BF02035781