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Title
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Determination of barium, lanthanum, cerium and neodymium in lateritic materials by various energy-dispersive X-ray fluorescence techniques and neutron activation analysis
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Author
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Abstract
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| A comparison of four methods for the determination of barium, lanthanum, cerium and neodymium in lateritic materials from Brazil is presented. Three of the methods were based on x-ray fluorescence (XRF) spectroscopy: two by radioisotope excitation (Co-57 and Am-241) and one by secondary target XRF (a molybdenum target with a tungsten anode). The other method was based on neutron activation analysis employing both a Ge(Li) coaxial detector and a high-purity germanium detector. The results from these four methods were similar for lanthanum, cerium and neodymium, but for barium at low concentrations (<500 ppm) the neutron activation and the secondary target XRF methods were not suitable. Data on the precision and accuracy of these methods using a series of standard reference rocks are given. The advantages and limitations of each of these methods with respect to the analysis of lateritic materials are discussed. |
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Language
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English
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Source (journal)
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X-ray spectrometry. - London
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Publication
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London
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1986
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ISSN
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0049-8246
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DOI
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10.1002/XRS.1300150105
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Volume/pages
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15
:1
(1986)
, p. 13-18
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ISI
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A1986AYN6000003
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Full text (Publisher's DOI)
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