Spectrophotometric determination of tungsten in rocks by an isotope dilution procedure
Journal of Research of the U.S. Geological Survey
By: E.G. Lillie and L. Paul Greenland
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Abstract
Samples are decomposed with hydrofluoric acid and perchloric acid in the presence of W181 tracer. Molybdenum is extracted from a hydrochloric acid solution with tributyl phosphate. Tungsten is separated from most other elements by extraction of the a-benzoinoximate into chloroform. Stannous chloride in concentrated hydrochloric acid is used to strip tungsten and reduce it to W+5 . The amount of tungsten is determined spectrophotometrically after extraction as the thiocyanate complex into amyl alcohol. The correction for chemical losses is determined by counting W181.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Spectrophotometric determination of tungsten in rocks by an isotope dilution procedure |
| Series title | Journal of Research of the U.S. Geological Survey |
| Volume | 1 |
| Issue | 5 |
| Year Published | 1973 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | 4 p. |
| First page | 555 |
| Last page | 558 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |