Teflon bomb decomposition of silicate materials in a microwave oven |
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Authors: | Reijo T.T. Rantala Douglas H. Loring |
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Affiliation: | Marine Chemistry Division, Physical and Chemical Sciences Branch, Department of Fisheries and Oceans, Bedford Institute of Oceanography, Dartmouth, Nova Scotia B2Y 4A2 Canada |
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Abstract: | A method is described for the decomposition of silicate materials in 20-tal Tefion- TFE bombs by using a domestic microwave oven. A domestic pressure cooker was used as a precautionary device to contain acid fumes. Total decomposition of the reference materials, marine sediment MESS-1 and granite G-2, was achieved in 60 s with a mixture of hydrofluoric acid and aqua regia. By using flame or graphite-furnace atomic absorption spectrometry, recoveries greater than 97% were obtained for aluminium, chromium and zinc and greater than 93% for silicon in the samples and for silicon in a pure quartz rod. |
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