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Determination of thorium by fluorescent x-ray spectrometry

Analytical Chemistry

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Abstract

A fluorescent x-ray spectrographic method for the determination of thoria in rock samples uses thallium as an internal standard. Measurements are made with a two-channel spectrometer equipped with quartz (d = 1.817 A.) analyzing crystals. Particle-size effects are minimized by grinding the sample components with a mixture of silicon carbide and aluminum and then briquetting. Analyses of 17 samples showed that for the 16 samples containing over 0.7% thoria the average error, based on chemical results, is 4.7% and the maximum error, 9.5%. Because of limitations of instrumentation, 0.2% thoria is considered the lower limit of detection. An analysis can be made in about an hour.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Determination of thorium by fluorescent x-ray spectrometry
Series title:
Analytical Chemistry
Volume
27
Issue:
6
Year Published:
1955
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
1002
Last page:
1003
Number of Pages:
2