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Phosphomethylated Polyethyleneimine-immobilized Chelating Resin: Role of Phosphomethylation Rate on Solid-Phase Extraction of Trace Elements

  • KAGAYA Shigehiro
    Graduate School of Science and Engineering for Research, University of Toyama
  • IKEDA Ryo
    Graduate School of Science and Engineering for Research, University of Toyama
  • KAJIWARA Takehiro
    Graduate School of Science and Engineering for Research, University of Toyama
  • GEMMEI-IDE Makoto
    Graduate School of Science and Engineering for Research, University of Toyama
  • INOUE Yoshinori
    Graduate School of Science and Engineering for Research, University of Toyama

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Abstract

<p>Chelating resins immobilizing phosphomethylated polyethyleneimine (PM-PEI) with different phosphomethylation (PM) rates were prepared by using different amounts of both phosphonic acid and paraformaldehyde in the phosphomethylation of PEI immobilized on a methacrylate resin as a base resin. The extraction of many elements improved with increasing PM rate; REEs, Be, Fe, Mo, Ti, and V were quantitatively extracted at pH 2. The elution of the elements tended to become difficult with increasing PM rate. When a PM-PEI resin with a PM rate of 0.26 was used, REEs and Be could be eluted using 0.2 mol L−1 EDTA solution adjusted to a pH of 7 and 3 mol L−1 nitric acid, respectively, although the elution of Fe, Mo, Ti, and V was insufficient. The PM-PEI resin could be reused at least 10 times to recover REEs and Be without the influence of any other elements. The PM-PEI resin could be applied to a recovery test using artificial seawater spiked with REEs, except for Sc, Tm, Yb, and Lu, and the separation of the REEs in NIST SRM 1515 Apple Leaves.</p>

Journal

  • Analytical Sciences

    Analytical Sciences 35 (4), 413-419, 2019-04-10

    The Japan Society for Analytical Chemistry

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