Abstract
In order to determine the rare earth elements (REE) in rocks, by neutron activation analysis, a group separation, before irradiation, was developed. The brazilian geological standards BB-1 and GB-1, provided by Instituto de Geociencias da Universidade da Bahia, were analyzed. The method was based an acid digestion of the samples, cation exchange separation with a Dowex 50WX8 column and coprecipitation of the REE with calcium oxalate. Interferers like U, Th, Ta and Fe were eliminated. The concentration values of ten REE (La, Ce, Pr, Nd, Sm, Eu, Tb, Ho, Yb and Lu) were determined. The analysis of Pr brought a contribution to the knowledge of the REE contents in these geological standards, since there are not yet results in the literature. The other REE data obtained were compared with literature values and some discrepancies are discussed. (author).
Alcala, A;
Figueiredo, A M.G.;
[1]
Marques, L S;
Astolfo, R
[2]
- Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)
- Sao Paulo Univ., SP (Brazil). Inst. Astronomico e Geofisico
Citation Formats
Alcala, A, Figueiredo, A M.G., Marques, L S, and Astolfo, R.
Method of rare earths determination, with separation pre-irradiation followed by neutron activation analysis. Using of brazilian standards BB-1 and GB-1; Metodo de determinacao de terras raras, com separacao pre-irradiacao seguida de ativacao neutronica. Aplicacao aos padroes brasileiros BB-1 e Gb-1.
Brazil: N. p.,
1992.
Web.
Alcala, A, Figueiredo, A M.G., Marques, L S, & Astolfo, R.
Method of rare earths determination, with separation pre-irradiation followed by neutron activation analysis. Using of brazilian standards BB-1 and GB-1; Metodo de determinacao de terras raras, com separacao pre-irradiacao seguida de ativacao neutronica. Aplicacao aos padroes brasileiros BB-1 e Gb-1.
Brazil.
Alcala, A, Figueiredo, A M.G., Marques, L S, and Astolfo, R.
1992.
"Method of rare earths determination, with separation pre-irradiation followed by neutron activation analysis. Using of brazilian standards BB-1 and GB-1; Metodo de determinacao de terras raras, com separacao pre-irradiacao seguida de ativacao neutronica. Aplicacao aos padroes brasileiros BB-1 e Gb-1."
Brazil.
@misc{etde_10108442,
title = {Method of rare earths determination, with separation pre-irradiation followed by neutron activation analysis. Using of brazilian standards BB-1 and GB-1; Metodo de determinacao de terras raras, com separacao pre-irradiacao seguida de ativacao neutronica. Aplicacao aos padroes brasileiros BB-1 e Gb-1}
author = {Alcala, A, Figueiredo, A M.G., Marques, L S, and Astolfo, R}
abstractNote = {In order to determine the rare earth elements (REE) in rocks, by neutron activation analysis, a group separation, before irradiation, was developed. The brazilian geological standards BB-1 and GB-1, provided by Instituto de Geociencias da Universidade da Bahia, were analyzed. The method was based an acid digestion of the samples, cation exchange separation with a Dowex 50WX8 column and coprecipitation of the REE with calcium oxalate. Interferers like U, Th, Ta and Fe were eliminated. The concentration values of ten REE (La, Ce, Pr, Nd, Sm, Eu, Tb, Ho, Yb and Lu) were determined. The analysis of Pr brought a contribution to the knowledge of the REE contents in these geological standards, since there are not yet results in the literature. The other REE data obtained were compared with literature values and some discrepancies are discussed. (author).}
place = {Brazil}
year = {1992}
month = {Dec}
}
title = {Method of rare earths determination, with separation pre-irradiation followed by neutron activation analysis. Using of brazilian standards BB-1 and GB-1; Metodo de determinacao de terras raras, com separacao pre-irradiacao seguida de ativacao neutronica. Aplicacao aos padroes brasileiros BB-1 e Gb-1}
author = {Alcala, A, Figueiredo, A M.G., Marques, L S, and Astolfo, R}
abstractNote = {In order to determine the rare earth elements (REE) in rocks, by neutron activation analysis, a group separation, before irradiation, was developed. The brazilian geological standards BB-1 and GB-1, provided by Instituto de Geociencias da Universidade da Bahia, were analyzed. The method was based an acid digestion of the samples, cation exchange separation with a Dowex 50WX8 column and coprecipitation of the REE with calcium oxalate. Interferers like U, Th, Ta and Fe were eliminated. The concentration values of ten REE (La, Ce, Pr, Nd, Sm, Eu, Tb, Ho, Yb and Lu) were determined. The analysis of Pr brought a contribution to the knowledge of the REE contents in these geological standards, since there are not yet results in the literature. The other REE data obtained were compared with literature values and some discrepancies are discussed. (author).}
place = {Brazil}
year = {1992}
month = {Dec}
}