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Determination of nanogram amounts of bismuth in rocks by substoichiometric isotope dilution analysis

Analytica Chimica Acta

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Abstract

A rapid procedure suitable for the routine determination of 1-10 ng of bismuth in a silicate rock matrix is described. Results for the U.S. Geological Survey standard rocks are presented. Rocks and minerals are dissolved in hydrofluoric-perchloric acid in the presence of 207Bi tracer and the silica is removed by evaporation. The perchloric acid residue is taken up in water and bismuth iodide is extracted into methyl isobutyl ketone. After three acid-iodide washes, the bismuth is stripped into water and reacted with a substoichiometric amount of EDTA. Excess of bismuth is extracted as the iodide and the specific activity of the bismuth-EDTA complex is determined. ?? 1972.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Determination of nanogram amounts of bismuth in rocks by substoichiometric isotope dilution analysis
Series title:
Analytica Chimica Acta
Volume
60
Issue:
1
Year Published:
1972
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Analytica Chimica Acta
First page:
159
Last page:
165
Number of Pages:
7