Abstract
KUMINS1 observed that mandelic acid separates zirconium quantitatively from a large number of elements, and its use as a specific reagent for zirconium is being extended in analytical practice2–4, in preference to the time-honoured methods of affecting the separation as phosphate or basic selenite5. In a series of papers, Klingenberg and his colleagues6,7 have investigated the possibility of using α-hydroxy carboxylic acids as specific reagents for zirconium determinations and have shown that a direct weighing of p-chloro- and p-bromo-mandelates of zirconium is a satisfactory procedure for the gravimetric determination of the metal. The halo-derivatives of mandelic acid exert a large weighting effect on the zirconium ion and further, unlike the zirconium mandelate, these are not water-soluble. Hahn8 has further explored the use of p-bromo-mandelic acid for the determination of the zirconium – hafnium ratio by a computation from the combined weights of the p-bromo-mandelate of zirconium and hafnium and the weight of the oxides obtained therefrom by ignition. Jonckers9 has studied the reactivity of groups in relation to their application to inorganic analysis.
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Verma, M. R., and Paul, S. D., J. Sci. and Indust. Res. (in the press).
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VERMA, M., PAUL, S. Volumetric Method for the Determination of Zirconium. Nature 173, 1237 (1954). https://doi.org/10.1038/1731237a0
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DOI: https://doi.org/10.1038/1731237a0
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