Study on the determination of uranium by activation analysis with epithermal neutrons
Description
A method is described that is applied to the determination of uranium in different types of materials, either by an entirely instrumental method or with the chemical separation of uranium-239, when the presence of interferences does not allow the instrumental analysis. The advantages and disadvantages in the use of epithermal neutrons in the activation of samples for a more selective activation of uranium-238 also presented. The instrumental method is tested through standart materials, accepted internationally. The possibility of uranium extraction with di-etil-hexilphosphoric acid is also presented and the choice of the former technique is justified. The sensitibility of the method is discussed as well as precision and accuracy through results obtained in the analysis of the standards and the calibration curve of uranium
Availability note (English)
MF available from INIS under the Report Number.Abstract (Portuguese)
Descreve-se um metodo que se aplica a determinacao de uranio em varios tipos de materiais, seja por metodo puramente instrumental ou seja com separacao quimica do uranio-239, quando a presenca de interferencias nao permite a analise instrumental apresenta-se tambem as vantagens e desvantages do uso de neutrons epitermicos na ativacao das amostras, para uma ativacao mais seletiva do uranio-238. Apresenta-se tambem a possibilidade da extracao do uranio com acido di-etil-hexilfosforico e justifica-se a escolha da tecnica anterior. Discute-se a sensibilidade do metodo e tambem a precisao e exatidao por meio dos resultados obtidos em analises de padroes e por meio da curva de calibracao do uranioFiles
10432183.pdf
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Additional details
Additional titles
- Original title (Portuguese)
- Estudo da determinacao de uranio por analise por ativacao com neutrons epitermicos
Publishing Information
- Imprint Pagination
- 90 p.
- Journal Issue
- no. 036
- Series
- IEA Dissertacao e Tese.
- Report number
- IEA-DT--036
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 10432183
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- ACCURACY; ACTIVATION ANALYSIS; CALIBRATION STANDARDS; ELEMENTS; EPITHERMAL NEUTRONS; GAMMA SPECTRA; INTERFERING ELEMENTS; TRACE AMOUNTS; URANIUM
- Descriptors DEC
- ACTINIDES; BARYONS; CHEMICAL ANALYSIS; ELEMENTARY PARTICLES; FERMIONS; HADRONS; METALS; NEUTRONS; NUCLEONS; SPECTRA