Journal of Radioanalytical and Nuclear Chemistry
Volume/Issue:
Volume 253: Issue 2
Preconcentration method for the determination of thorium in natural water by wavelength dispersive X-ray fluorescence spectrometry
Authors:
M. de Carvalho Cidade Universitária Instituto de Engenharia Nuclear - CNEN/RJ Ilha do Fundão C. Postal 68.550 CEP 21.945-970 Rio de Janeiro, RJ Brazil

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M. Domingues Cidade Universitária Instituto de Engenharia Nuclear - CNEN/RJ Ilha do Fundão C. Postal 68.550 CEP 21.945-970 Rio de Janeiro, RJ Brazil

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J. Mantovano Cidade Universitária Instituto de Engenharia Nuclear - CNEN/RJ Ilha do Fundão C. Postal 68.550 CEP 21.945-970 Rio de Janeiro, RJ Brazil

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J. da Cunha Cidade Universitária Instituto de Engenharia Nuclear - CNEN/RJ Ilha do Fundão C. Postal 68.550 CEP 21.945-970 Rio de Janeiro, RJ Brazil

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Pages:
253–256
Online Publication Date:
01 Nov 2004
Publication Date:
17 Aug 2002
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1019649809404
Restricted access

Abstract  

The preconcentration of thorium from natural water and its determination directly by wavelength dispersive X-ray fluorescence spectrometry (WDXRF) were attempted. The first step consists of thorium preconcentration from slightly acid solutions on polyurethane foam (PUF) loaded with 2-etilhexylphosphonic acid (EHPA) reagent as solid phase. PUF held up to 50% (w/w) of the reagent and the preconcentration was maximum at the acidity of 0.25 mol.l-1 hydrochloric solution. Sorption on PUF had fast kinetics and 4.0 and 10 mg.l-1 detection and quantitation limits of thorium were achieved, respectively, as well as a R.S.D. of 4.2% at 21.7 mg.l-1. This method was successfully applied to natural water analyses. The results were in good agreement with reference values of water samples at 95% confidence level.

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Cover Journal of Radioanalytical and Nuclear Chemistry
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN:
0236-5731
Online ISSN:
1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation		 1968
Volumes
per Year		 1
Issues
per Year		 12
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)

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