Spectrographic determination of thorium in uranium ore

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac60181a023· OSTI ID:6402433

Ko, R; Weiler, M R

The analytical chemistry of thorium is, at best, a complicated matter. Determination in uranium ores is further complicated by the refractory nature of ores and the occurrence of thorium in trace amounts in the presence of gross amounts of other elements with difficult analytical problems. Thorium in uranium ores was separated and purified by lanthanum fluoride precipitation and TTA extraction. After the purification, zirconium internal standard was added and the thorium determined by emission spectrometry. Successful determinations were made on 1 gram of uranium ore containing as little as 0.1 ppM of thorium with an average Th/sup 234/ tracer recovery of 85%. The precision of the method expressed as a relative standard deviation was +-12% at the 1 ppM level.

• Research Organization: General Electric Co., Richland, WA
• OSTI ID: 6402433
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 34:1; ISSN ANCHA
• Country of Publication: United States
• Language: English

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ACTINIDES
CHEMICAL ANALYSIS
ELEMENTS
EXTRACTION
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
KETONES
LANTHANUM COMPOUNDS
LANTHANUM FLUORIDES
METALS
ORES
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PRECIPITATION
QUANTITATIVE CHEMICAL ANALYSIS
RARE EARTH COMPOUNDS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTROSCOPY
THORIUM
TTA
URANIUM ORES