Spectrophotometric determination of tungsten in rocks by an isotope dilution procedure

Journal of Research of the U.S. Geological Survey
By:  and 

Links

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.

Additional publication details

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
Google Analytic Metrics Metrics page
Additional metadata about this publication, not found in other parts of the page is in this table