Ionic Liquid-based Extraction of Heteropoly Molybdic Acids for the Sensitive Determination of Si,P, and As in High-purity Iron
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概要
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Traces of Si(IV), P(V), and As(V) in an iron sample solution were converted into heteropoly molybdic acids at 0.5 M acidity. They were extracted into a tiny amount of 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([BMIM][NTf2]), leaving the iron(III) matrix in the solution. The ionic liquid was diluted with methanol and analyzed by high-performance liquid chromatography with spectrophotometric detection at 310 nm. The distinct, well-separated peak was obtained for Si(IV), while the peaks of P(V) and As(V) were not separated from each other. To discriminate between P(V) and As(V), the extracted molybdoarsenic acid was decomposed with tetramethylammonium hydroxide before the HPLC analysis. The proposed method allowed the determination of Si, P, and As at low- to sub-μg g–1 levels in high-purity iron metals.
- 社団法人 日本鉄鋼協会の論文
- 2012-01-15
著者
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Hiraide Masataka
Department Of Materials Science And Engineering Nagoya University
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Matsumiya Hiroaki
Department Of Molecular Design And Engineering Graduate School Of Engineering Nagoya University
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Matsumiya Hiroaki
Department Of Biomolecular Engineering Graduate School Of Engineering Tohoku University
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INAGAKI Yusuke
Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University
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Inagaki Yusuke
Department Of Molecular Design And Engineering Graduate School Of Engineering Nagoya University
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