title: Anion-exchange separation and spectrophotometric determination of thorium in geological samples.
abstract: To determine thorium in geological samples it is first separated from all matrix elements by means of anion-exchange. After elution thorium is determined spectrophotometrically by using thoronol or arsenazo III. The suitability of the method for the determination of both trace and larger amounts of thorium was tested by analysing numerous geochemical standard samples with thorium contents in the range of 1-1000 ppm. In all cases very good agreement was obtained.
authors.affiliation: Analytical Institute, Division: Analysis of Nuclear Raw Materials, University of Vienna, Währingerstrasse 38, A-1090 Vienna, Austria.
authors.forename: J
authors.initials: J
authors.lastname: Korkisch
authors.forename: D
authors.initials: D
authors.lastname: Dimitriadis