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Determination of rare earth impurities in thorium by spectrographic methods

Technical Report:

Abstract

A method for determining rare earth impurities in thorium in the fractional ppm range is described. Before spectrographic examination is possible, the impurities must be freed from the thorium matrix. This is accomplished by removing the bulk of the thorium by extraction with TBP-CCl{sub 4} and the remainder by extraction with TTA-C{sub 6}H{sub 6}. This results in a consistent recovery of rare earths of about 85% with an average sensitivity of 0.2 ppm. The experimental error is within 10%. Details of the procedure are given together with working curves for the major neutron absorbing rare earths; i.e. dysprosium, europium, gadolinium and samarium. (author)
Authors:
Publication Date:
Aug 15, 1957
Product Type:
Technical Report
Report Number:
AECL-546; CRDC-742
Resource Relation:
Other Information: 14 refs., 11 tabs., 12 figs
Subject:
36 MATERIALS SCIENCE; DYSPROSIUM; EUROPIUM; GADOLINIUM; IMPURITIES; RARE EARTHS; SAMARIUM; SPECTROSCOPY; THORIUM
OSTI ID:
21242122
Research Organizations:
Atomic Energy of Canada Limited, Chalk River, Ontario (Canada)
Country of Origin:
Canada
Language:
English
Other Identifying Numbers:
TRN: CA0900527103727
Availability:
Available from INIS in electronic form
Submitting Site:
CANN
Size:
31 pages
Announcement Date:
Dec 23, 2009

Technical Report:

Citation Formats

Wray, L W. Determination of rare earth impurities in thorium by spectrographic methods. Canada: N. p., 1957. Web.
Wray, L W. Determination of rare earth impurities in thorium by spectrographic methods. Canada.
Wray, L W. 1957. "Determination of rare earth impurities in thorium by spectrographic methods." Canada.
@misc{etde_21242122,
title = {Determination of rare earth impurities in thorium by spectrographic methods}
author = {Wray, L W}
abstractNote = {A method for determining rare earth impurities in thorium in the fractional ppm range is described. Before spectrographic examination is possible, the impurities must be freed from the thorium matrix. This is accomplished by removing the bulk of the thorium by extraction with TBP-CCl{sub 4} and the remainder by extraction with TTA-C{sub 6}H{sub 6}. This results in a consistent recovery of rare earths of about 85% with an average sensitivity of 0.2 ppm. The experimental error is within 10%. Details of the procedure are given together with working curves for the major neutron absorbing rare earths; i.e. dysprosium, europium, gadolinium and samarium. (author)}
place = {Canada}
year = {1957}
month = {Aug}
}