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Time-resolved laser-induced fluorescence spectroscopy combined with parallel factor analysis: a robust speciation technique for UO2 2+

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Abstract

Time-resolved laser-induced fluorescence spectroscopy (TRLFS) is a powerful speciation technique for fluorescent metal ions and can be further improved by combining with multi-mode factor analysis such as parallel factor analysis (PARAFAC). This study demonstrates the applicability of TRLFS combined with PARAFAC for the speciation of uranyl (UO2 2+) in the presence of silicic acid (Si(OH)4). A series of TRLFS data with varied Si(OH)4 concentration was processed by PARAFAC, resulting in three factors corresponding to free UO2 2+, UO2SiO(OH) +3 , and UO2OH+. The stability constant of UO2SiO(OH) +3 was further optimized, based on the intensity profiles of the factors.

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Acknowledgments

The author (T.S.) thanks Mr. Hirokazu SAO for his assistance in the TRLFS measurements.

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Authors and Affiliations

  1. Advanced Science Research Center, Nuclear Science Research Institute, Japan Atomic Energy Agency, Ibaraki, 2-4 Shirakata Shirane, Tokai-mura, Naka-gun, Ibaraki, 319-1195, Japan

    Takumi Saito

  2. Nuclear Science and Engineering Center, Nuclear Science Research Institute, Japan Atomic Energy Agency, 2-4 Shirakata Shirane, Tokai-mura, Naka-gun, Ibaraki, 319-1195, Japan

    Noboru Aoyagi & Takaumi Kimura

Authors
  1. Takumi Saito
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  2. Noboru Aoyagi
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  3. Takaumi Kimura
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Correspondence to Takumi Saito.

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Saito, T., Aoyagi, N. & Kimura, T. Time-resolved laser-induced fluorescence spectroscopy combined with parallel factor analysis: a robust speciation technique for UO2 2+ . J Radioanal Nucl Chem 303, 1129–1132 (2015). https://doi.org/10.1007/s10967-014-3465-7

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  • DOI: https://doi.org/10.1007/s10967-014-3465-7

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