| Autor: | P. Fafouteli, M. Ochsenkühn-Petropoulou, K. M. Ochsenkühn |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Ion exchange
Isotope Chemistry Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health Analytical chemistry engineering.material Pollution Analytical Chemistry Bauxite chemistry.chemical_compound Nuclear Energy and Engineering Selective adsorption engineering Aqua regia Radiology Nuclear Medicine and imaging Gamma spectroscopy Leaching (metallurgy) Neutron activation analysis Spectroscopy |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 253:257-262 |
| ISSN: | 0236-5731 |
| DOI: | 10.1023/a:1019601926242 |
| Popis: | For the determination of gold in Greek bauxites from the Parnassos-Ghiona area, an analytical technique was used based on the selective adsorption of gold on SRAFION NMRR chelating anion exchanger resin, after leaching the bauxites with aqua regia in a teflon-autoclave at 120 °C, and the determination of the retained gold directly on the resin by instrumental neutron activation analysis (INAA), using the 411.8 keV line of the 198Au isotope. The procedure allowed to determine Au in concentrations down to ng/g. The obtained data were used to examine the distribution of Au in the profiles of a group of different bauxites from the upper or the called third bauxitic horizon of the Parnassos-Ghiona area in Greece. Especially in the basement of some bauxite deposits unexpected high concentrations of Au up to 2 mg/g have been found. Furthermore, the correlation of Au with other trace elements, found in the bauxitic samples, was investigated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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