Determination of Osmium Traces in Natural Samples |
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| Authors: | O. A. Tyutyunnik I. Ya. Koshcheeva V. A. Orlova T. V. Shumskaya S. A. Gorbacheva |
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| Affiliation: | (1) Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991, Russia;(2) Central Research Institute of the Agrochemical Service of Agriculture, Russian Academy of Agricultural Sciences, ul. Pryanishnikova 31a, Moscow, 127550, Russia;(3) Institute of the Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 109017, Russia |
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| Abstract: | A method is proposed for the autoclave sample preparation of osmium-containing rocks and ores. The method is compatible with the subsequent diffusion preconcentration of osmium. The best composition of the acid mixture is found for the autoclave decomposition of chromites and other hard-to-decompose materials; the best conditions for the decomposition of rocks are found in order to avoid a loss of osmium at this stage. The detection limits of osmium in chromites are 2.5 ng/g for kinetic determination, 5 ng/g for ICP AES determination, and 0.1 ng/g for ICP MS determination. |
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