Direct determination of gallium on polyurethane foam by X-ray fluorescence |
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| Authors: | Carvalho M S Medeiros J A Nóbrega A W Mantovano J L Rocha V P |
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| Institution: | Instituto de Engenharia Nuclear, Comiss?o Nacional de Energia Nuclear, Cidade Universitária, Ilha do Fund?o-Rio de Janeiro-Brasil 21945-970. |
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| Abstract: | Gallium chloride is easily extracted from 6M HCl by comminuted polyether-type polyurethane foam. After the extraction step, the gallium absorbed by the PU foam can be quantitatively determined by X-ray fluorescence. A procedure for the direct determination of gallium absorbed by PU foam by XRFS is thus described. Gallium is determined at levels as low as 60 ng/ml (C(L)), with a calibration sensitivity of 424 cps ml/mug, within a linear range 0.1-2.30 mug/ml. The procedure investigated was successfully applied to determination of gallium in aluminum alloys, bauxite and industrial residue samples. |
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