Quantitative analysis of trivalent uranium and lanthanides in a molten chloride by absorption spectrophotometry

Toshiyuki Fujii, Takeshi Uda, Kazuhito Fukasawa, Akihiro Uehara, Nobuaki Sato, Takayuki Nagai, Kensuke Kinoshita, Tadafumi Koyama, Hajimu Yamana

研究成果: Article査読

8 被引用数 (Scopus)


As an analytical application for pyrochemical reprocessing using molten salts, quantitative analysis of uranium and lanthanides by UV/Vis/NIR absorption spectrophotometry was performed. Electronic absorption spectra of LiCl-KCl eutectic at 773 K including trivalent uranium and eight rare earth elements (Y, La, Ce, Pr, Nd, Sm, Eu, and Gd as fission product elements) were measured in the wavenumber region of 4,500-33,000 cm-1. The composition of the solutes was simulated for a reductive extraction condition in a pyroreprocessing process for spent nuclear fuels, that is, about 2 wt% U and 0.1-2 wt% rare earth elements. Since U(III) possesses strong absorption bands due to f-d transitions, an optical quartz cell with short light path length of 1 mm was adopted in the analysis. The quantitative analysis of trivalent U, Nd, Pr, and Sm was possible with their f-f transition intensities in the NIR region. The analytical results agree with the prepared concentrations within 2σ experimental uncertainties.

ジャーナルJournal of Radioanalytical and Nuclear Chemistry
出版ステータスPublished - 2013 4月

ASJC Scopus subject areas

  • 分析化学
  • 原子力エネルギーおよび原子力工学
  • 放射線学、核医学およびイメージング
  • 汚染
  • 分光学
  • 公衆衛生学、環境および労働衛生
  • 健康、毒物学および変異誘発


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