Spektrophotometrische Bestimmung von Tantalspuren in Niob mit Malachitgrün |
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| Authors: | Olga Grossmann |
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| Institution: | 1. Institut für Metallphysik und Reinstmetalle der Deutschen Akademie der Wissenschaften zu Berlin, Dresden
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| Abstract: | Traces of tantalum are separated from niobium by extraction from hydrofluoric acid solution with methylisobutyl ketone. The determination of the separated trace amounts of tantalum is based upon their conversion to a complex with malachite green, the absorbance of which is measured at 635 nm. 0.2 μg of tantalum can be determined in 0.5 g of niobium metal. |
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