Studies on Analytical Methods for Trace Elements in Metals by Using Radioactive Isotope. III : Determination of Tantalum by Means of Isotope Dilution Method
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The determination of tantalum by isotope dilution method in the presence of niobium was investigated by the use of radioactive isotope tantalum-185. Tantalum was separated from niobium as tantalum-tannin precipitate under the optimum condition of pH 1.9〜2.5 and tantalum/niobium ratio up to 1/50. If niobium had been present 100 times or more of tantalum, reprecipitation would have been needed. The reciprocal of the specific activity of tantalum pentoxide preciptiate was in a linear relation to the change in the amount of tantalum added. The recommended method gave an accurate result in the determination of tantalum in steel.
- 東北大学の論文
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