Thermoionic emission characteristics of uranium with application to its determination by MSID technique using 233U tracer
Description
Experimental details of the uranium determination in geological samples (50-1500 ppm range) by mass spectrometric isotope dilution technique (MSID) employing 233U tracer are presented. For this purpose the thermoionic emission characteristics of uranium in various filament arrangements like simple plane, filament boat, double, are studied and the most efficient one selected for the isotope dilution analysis. The various experimental procedures involved in the MSID like sample dissolution, chemical separation and mass spectrometric analysis are developed and optimised. The experimental results on the uranium determination by MSID with 233U tracer yielded precision and accuracy of 0,5% and 1% respectively. The importance of the sampling in the precise and accuracy determination of uranium in geological samples, where it is heterogeneously distributed, is discussed. (author)
Availability note (English)
MF available from INIS under the Report Number.Abstract (Portuguese)
Apresentam-se, neste trabalho, detalhes experimentais da tecnica de diluicao isotopica por espectrometria de massa (DIEM) empregando o tracador isotopico enriquecido em 233U para determinacao de uranio em amostras geologicas na faixa de concentracao de 50-1500 ppm. Para este fim, realizou-se estudo da emissao termionica do uranio no filamento de renio com arranjos simples plano, simples barco e duplo para analise isotopica de uranio por espectrometria de massa e, estabeleceu-se procedimentos de dissolucao e separacao quimica de uranio. Os resultados experimentais de uranio determinados pela tecnica de DIEM com tracador 233U apresentaram precisao e exatidao de 0,5% e 1%, respectivamente. Discute-se a importancia da amostragem na determinacao precisa de uranio em amostra de rocha, onde este esta distribuido heterogeneamento. (autor)Files
20048027.pdf
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Additional details
Additional titles
- Original title (Portuguese)
- Caracterizacao da emissao termoionica do uranio e sua determinacao com a aplicacao da tecnica de diluicao isotopica por espectrometria de massa usando o tracador enriquecido
Publishing Information
- Imprint Pagination
- 63 p.
- Report number
- IPEN-PUB--214
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 20048027
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- ISOTOPE DILUTION; MASS SPECTROSCOPY; ROCKS; THERMIONIC EMISSION; URANIUM 233
- Descriptors DEC
- ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; EMISSION; EVEN-ODD NUCLEI; HEAVY ION DECAY RADIOISOTOPES; HEAVY NUCLEI; ISOTOPE APPLICATIONS; ISOTOPES; NEON 24 DECAY RADIOISOTOPES; NUCLEI; RADIOISOTOPES; SPECTROSCOPY; SPONTANEOUS FISSION RADIOISOTO; TRACER TECHNIQUES; URANIUM ISOTOPES; YEARS LIVING RADIOISOTOPES