Abstract

A new method has been described for the gravimetric estimation, from a tartrate solution, of niobium and tantalum by quinaldinohydroxamic acid. In theph range of 5.0 to ammoniacal, both the elements are quantitatively precipitated from an ice-cold solution in presence of ammonium chloride and can be separated from quite a large number of ions using EDTA as a masking agent.

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