Graphite furnace atomic absorption spectrometry with a tantalum boat for the determination of yttrium, samarium, and dysprodium in a mish metal.

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概要

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• The determination of yttrium, samarium, and dysprodium by means of graphite-furnace atomic absorption spectrometry (AAS) was studied by a tantalum boat inserted into a graphite tube atomizer. These elements could not be determined by the use of a commercial graphite tube. In the atomization from a tantalum boat, better analytical sensitivities and negligible memory effects for these rare earths are obtained. The analytical sensitivities of yttrium, samarium, and dysprodium with the tantalum boat were 0.60 ng, 0.86 ng, and 0.17 ng respectively. This method was applied for the determination of yttrium, samarium, and dysprodium in a mish metal. The measurements were performed with slightly acidified solutions (0.01 mol dm<SUP>−3</SUP> HCl or HNO<SUB>3</SUB>). The sensitivities and the precisions for these elements decreased with increasing acid concentration. An enhancement in the sensitivities of yttrium and dysprodium upon the addition of a large excess of lanthanum, neodymium, and praseodymium salts were observed. The yttrium, samarium, and dysprodium in a mish metal were determined with both analytical curves of standard solutions containing an excess of lanthanum, cerium, and neodymium ions and of the standard addition. The precisions for this work were in the 3–9.3% range.

• 公益社団法人 日本化学会の論文

著者

• Tamura Shohei

  The Institute For Solid State Physics University Of Tokyo

• Daidoji Hidehiro

  The Institute for Solid State Physics, The University of Tokyo

関連論文

• Impurity-Vacancy Association in Sodium Chloride Containing Calcium
• Graphite furnace atomic absorption spectrometry with a tantalum boat for the determination of yttrium, samarium, and dysprodium in a mish metal.

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