Spectrophotometric determination of tungsten in rocks by an isotope dilution procedure
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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.
Suggested Citation
Lillie, E., and Greenland, L.P., 1973, Spectrophotometric determination of tungsten in rocks by an isotope dilution procedure: Journal of Research of the U.S. Geological Survey, v. 1, no. 5, p. 555-558.
| 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 |