Differential pulse polarographic determination of traces of molybdenum in solar-grade silicon |
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Authors: | Pier Luigi Buldini Donatella Ferri |
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Institution: | C.N.R.-Istituto LAMEL. Via de''Castagnoli 1, 40126 BolognaItaly;Istituto Chimico, Facoltà di Ingegneria, Università di Bologna, 40136 BolognaItaly |
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Abstract: | After dissolution of silicon with hydrofluoric and nitric acids and matrix volatilization as hexafluorosilicic acid, 0.2 M nitric acid and 1.8 M ammonium nitrate are added to the residue. Molybdate is then determined by means of its catalytic wave in nitrate media. The limit of determination is ca. 0.1 μg g-1 and calibration graphs are linear up to 0.2 μg Mo(VI) ml-1. |
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