INAA in the determination of the elemental constituents of a natural fluorite
| Autor: | I. A. Tubosun, J. O. Ojo, A. O. Akanle, F. A. Balogun, C. A. Adesanmi, Nicholas M. Spyrou, J. A. Ajao |
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| Rok vydání: | 1997 |
| Předmět: |
Mineral
Chemistry Health Toxicology and Mutagenesis Nondestructive analysis Public Health Environmental and Occupational Health Analytical chemistry Electron microprobe Pollution Fluorite Analytical Chemistry Matrix (chemical analysis) Nuclear Energy and Engineering Radiology Nuclear Medicine and imaging Neutron activation analysis Spectroscopy |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 222:35-38 |
| ISSN: | 1588-2780 0236-5731 |
| Popis: | A complementary use of the comparative and the semi-absolute variations of instrumental neutron activation analysis (INAA) has enabled us to determine 22 different elements in a sample of natural fluorite originating from the younger granite province of Nigeria. The mineral has a brownish purple appearance with some veinlets having a deep purple coloration. Of all the 22 elements measured, Fe (851.36 ppm), Sb (7.69 ppm), Ag (87.4 ppm), Hg (2.71 ppm) and Se (1.97 ppm) are found to be exclusive to the veinlets while Au (109.15 ppm), Co (2.15 ppm) and W (173.20 ppm) are concentrated in the main matrix of the fluorite. With the aid of the semi-absolute method, it was possible to measure the Au concentration in the IAEA Soil-7 reference material to be 56.83±5.87% ppm. A qualitative electron microprobe analysis (EMA) showed that the bulk of the matrix is composed mainly of Ca and F, as expected. |
| Databáze: | OpenAIRE |
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