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Instrumental Neutron Activation Analysis of River Sediments from Rio Tigre (Venezuela) Employing a Planar Germanium Detector

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Abstract:

Thirteen elements and eleven rare-earth elements (La, Ce, Nd, Sm, Eu, Gd, Tb, Ho, Tm, Yb, and Lu), as well as thorium and uranium, were determined in river sediment samples from the Tigre River, Venezuela, by instrumental neutron activation analysis employing a low-energy photon detector. The analyses were performed on the <63-μm grain size fraction by the following scheme: one irradiation for only 5 h in IVIC's RV-1 nuclear reactor followed by three counting periods, approximately one, three, and seven weeks after the irradiation. This scheme was employed with the purpose of being able to routinely analyze many samples rather than to optimize thirteen different element determinations.

Keywords: INNA; Rare earth elements; River sediments

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702864507648

Affiliations: 1: Instituto Venezolano de Investigaciones Cientificas, I.V.I.C. Apartado 21827, Caracas 1020-A, Venezuela; present address: IAEA, P.O. Box 100, A-1400 Vienna, Austria 2: Instituto Venezolano de Investigaciones Cientificas, I.V.I.C. Apartado 21827, Caracas 1020-A, Venezuela

Publication date: November 1, 1986

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sas/sas/1986/00000040/00000008/art00029
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