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DOE OSTI · 2502182

Isotopic analysis of Nd nanoparticles using single particle MC-ICP-MS: A comparative study with single particle-ICP-TOF-MS

Manard, Benjamin T. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000207400627)·Bradley, Veronica C. [Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000246333009)·Hendriks, Lyndsey [TOFWERK AG, Thun (Switzerland); University of Vienna (Austria)]·Dunlap, Daniel R. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)]·Zirakparvar, N. Alex [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000337797730)·Ticknor, Brian W. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000228679073)·Toro-Gonzalez, Miguel [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:000000033320423X)·Andrews, Hunter B. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000220919415)
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Abstract

Single particle - inductively coupled plasma - mass spectrometry (SP-ICP-MS) is a powerful technique for characterization of the elemental and isotopic composition of individual particles. In this work, the capabilities of the newest generation of MC-ICP-MS with acquisition rates down to 50 ms were evaluated for single particle analysis, with a focus on isotopic precision achievable on a single-particle level. Nd (NdVO 4 ) nanoparticles (~120 nm in diameter) were used as case study and were first characterized in terms of mass (respective size) and particle number concentration by SP-ICP-TOF-MS and then by SP-MC-ICP-MS for isotopic precision. For the isotopic ratio measurements, the MC-ICP-MS performance was compared to the ICP-TOF-MS and it was found that the isotope ratio precision was increased (R 2 between 0.98 and 0.99) compared to ICP-TOF-MS (R 2 between 0.88 and 0.97). The accuracy attained on a single particle level, was compared to bulk digestion followed by MC-ICP-MS analysis, and the SP-MC-ICP-MS technique was able to determine the particle population average to be <4 %, percent relative differences for the 142 Nd/ 144 Nd, 143 Nd/ 144 Nd, 145 Nd/ 144 Nd, 146 Nd/ 144 Nd, and 148 Nd/ 144 Nd ratios The detection limit for the SP-MC-ICP-MS approach was also assessed. Here, when utilizing an all Faraday-cup based detection scheme the determined LOD for the measurements was 0.2fg for Nd, per particle. Based on these results, the newest generation of MC-ICP-MS has demonstrated its utility for performing SP measurement, particularly when high precision isotopic determination is warranted.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRYICP-MSICP-TOF-MSIsotopic ratioMC-ICP-MSNanoparticleSingle particle

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Manard, Benjamin T. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000207400627), Bradley, Veronica C. [Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000246333009), Hendriks, Lyndsey [TOFWERK AG, Thun (Switzerland); University of Vienna (Austria)], Dunlap, Daniel R. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)], Zirakparvar, N. Alex [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000337797730), Ticknor, Brian W. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000228679073), Toro-Gonzalez, Miguel [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:000000033320423X), Andrews, Hunter B. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000220919415). 2025-01-03. Isotopic analysis of Nd nanoparticles using single particle MC-ICP-MS: A comparative study with single particle-ICP-TOF-MS. https://doi.org/10.1016/j.talanta.2025.127516

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