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<p>Recent multi-collector ICP-MS instruments have adopted the use of collision reaction cells that allow for online gas-phase ion–molecule interactions and ion separations. In this work, we used carbon dioxide (CO<sub>2</sub>) in the Neoma MS/MS for online separation of uranium (U) and plutonium (Pu) ions. Uranium and&#xa0;Pu isotopic compositions and interelement ratios were determined simultaneously by measuring U as oxide ions and Pu as metal ions. This measurement is made possible by purifying the CO<sub>2</sub> prior to entering the collision cell, resulting in reduced backgrounds that appear on ion counters when reactive gases are used.</p>

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Simultaneous analysis of U and Pu isotopes by MC-ICP-MS/MS using purified CO2

  • 期刊论文

  • 发表日期：

    2026年2月11日

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  • Sean R. Scott,
  • Kirby P. Hobbs,
  • Lee H. Hughes,
  • Isaac J. Arnquist,
  • Tyler D. Schlieder,
  • Daniel L. Sullivan,
  • Amanda D. French

摘要

Recent multi-collector ICP-MS instruments have adopted the use of collision reaction cells that allow for online gas-phase ion–molecule interactions and ion separations. In this work, we used carbon dioxide (CO2) in the Neoma MS/MS for online separation of uranium (U) and plutonium (Pu) ions. Uranium and Pu isotopic compositions and interelement ratios were determined simultaneously by measuring U as oxide ions and Pu as metal ions. This measurement is made possible by purifying the CO2 prior to entering the collision cell, resulting in reduced backgrounds that appear on ion counters when reactive gases are used.