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Determination of niobium in rocks by an isotope dilution spectrophotometric method

Analytica Chimica Acta

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Abstract

Rocks and minerals are fused with sodium peroxide in the presence of carrierfree 95Nb. The fusion cake is leached with water and the precipitate dissolved in hydrofluoric-sulfuric acid mixture. Niobium is extracted into methyl isobutyl ketone and further purified by ion exchange. The amount of niobium is determined spectrophotometrically with 4-(2-pyridylazo)-resorcinol, and the chemical yield of the separations determined by counting 95Nb. This procedure is faster and less sensitive to interferences than previously proposed methods for determining niobium in rocks.The high purity of the separated niobium makes the method applicable to nearly all matrices. ?? 1970.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Determination of niobium in rocks by an isotope dilution spectrophotometric method
Series title:
Analytica Chimica Acta
Volume
49
Issue:
1
Year Published:
1970
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Analytica Chimica Acta
First page:
109
Last page:
114
Number of Pages:
6