Enhanced Pu emission with solution-loaded laser ablation modified sources (SLLAMS) for thermal ionization mass spectrometry

McHugh, Kelly; Krogstad, E. J.

doi:10.1016/j.ijms.2020.116471

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…These existing sample loading techniques, utilizing resin beads and porous ion emitters (PIEs) as well as running in other polyatomic forms such as oxides (e.g., NdO + rather than Nd + ), have been developed to overcome innate low ionization efficiencies (Table ). ,− Known strategies for increasing sample utilization efficiency for TIMS include: (1) confining the sample emission to a point source; , (2) changing the oxidation state of the sample; ,, (3) establishing a high surface area in the ion emitting region of the filament to maximize sample ionization; ,,, and (4) incorporating a high work function, highly refractory metal during the loading procedure . Resin beads, which address the first two requirements listed above, have remained nearly unchanged since first introduced in the 1970s .…”

Section: Introductionmentioning

confidence: 99%

Designing Porous Ion Emitters for Thermal Ionization Mass Spectrometry: Evaluating Metal–Organic Frameworks

et al. 2022

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This work describes the first exploration of metal− organic frameworks (MOFs) as "next-generation" ion emitters for thermal ionization mass spectrometry (TIMS). MOFs were identified as promising candidates for this application given the synthetic control over their desired structural properties. This tunability results in well-ordered, high-surface-area, high-porosity frameworks with targeted sorption affinities. Here, we explored an aluminum-based, bipyridine-containing MOF (MOF-253) with and without incorporating a high work function metal, rhenium (Re). After analysis of an Nd-bearing MOF, we hypothesized that the well-dispersed, sponge-like interconnected network of the degraded structure would enhance Nd ionization more than traditional TIMS loading techniques (i.e., phosphoric acid). Compared to filaments loaded with phosphoric acid that require an additional benzene carburization step, the Nd ionization efficiencies (atoms detected relative to atoms loaded) for heated filaments loaded with MOF-253 were similar (∼1%). Electron microscopy after TIMS analysis demonstrated that the MOF was retained on the filament. While these results are preliminary, they demonstrate that MOFs have potential to enhance ionization and exceed the performance of traditional loading techniques by forming nanoporous ion emitters. Thus, further experimentation is likely to exceed this performance through more specific selection of the base MOF structure and modifications to porosity and composition. This work represents a novel application of MOFs and a next step in the pursuit of advanced thermal ionization with potential to expand across the periodic table.

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Section: Introductionmentioning

confidence: 99%

Designing Porous Ion Emitters for Thermal Ionization Mass Spectrometry: Evaluating Metal–Organic Frameworks

et al. 2022

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“…Plutonium isotopes were also the focus of a study investigating solution loaded laser ablation modified sources for TIMS analysis. 202 A Parafilm coating was applied to the filament surface and then ablated through the film to the metal beneath creating a central point source. A Pu solution can then be applied to this area and slowly dried.…”

Section: Inorganic Chemicals and Materialsmentioning

confidence: 99%

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

Carter

Clough

Fisher

et al. 2021

J. Anal. At. Spectrom.

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Enhanced Pu emission with solution-loaded laser ablation modified sources (SLLAMS) for thermal ionization mass spectrometry

Cited by 2 publications

References 14 publications

Designing Porous Ion Emitters for Thermal Ionization Mass Spectrometry: Evaluating Metal–Organic Frameworks

Designing Porous Ion Emitters for Thermal Ionization Mass Spectrometry: Evaluating Metal–Organic Frameworks

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

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