2014年2月
Highly Efficient Extraction Separation of Lanthanides Using a Diglycolamic Acid Extractant
ANALYTICAL SCIENCES
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- 巻
- 30
- 号
- 2
- 開始ページ
- 263
- 終了ページ
- 269
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.2116/analsci.30.263
- 出版者・発行元
- JAPAN SOC ANALYTICAL CHEMISTRY
Liquid-liquid extraction of lanthanide ions (Ln(3+)) using N,N-dioctyldiglycolamic acid (DODGAA) was comprehensively investigated, together with fluorescence spectroscopic characterization of the resulting extracted complexes in the organic phase. DODGAA enables the quantitative partitioning of all Ln(3+) ions from moderately acidic solutions, while showing selectivity for heavier lanthanides, and provides remarkably high extraction separation performance for Ln(3+) compared with typical carboxylic acid extractants. Furthermore, the mutual separation abilities of DODGAA for light lanthanides are higher than those of organophosphorus extractants. Slope analysis, loading tests, and electrospray ionization mass spectrometry measurements demonstrated that the transfer of Ln(3+) with DODGAA proceeded through a proton-exchange reaction, forming a 1:3 complex, Ln(DODGAA)(3). The stripping of Ln(3+) from the extracting phase was successfully achieved under acidic conditions. Time-resolved laser-induced fluorescence spectroscopy revealed that the extracted Eu3+ ions were completely dehydrated by complexation with DODGAA.
- リンク情報
- ID情報
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- DOI : 10.2116/analsci.30.263
- ISSN : 0910-6340
- eISSN : 1348-2246
- Web of Science ID : WOS:000331990500011