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A corundum reference material for oxygen isotope analysis by secondary ionization mass spectrometry

A synthetic laser ruby crystal (HD-LR1) is introduced as a new matrix-matched reference material for secondary ionization mass spectrometry (SIMS) analysis of oxygen isotopes in corundum. Laser fluorination isotope ratio mass spectrometry (LF-IRMS) bulk analyses of multiple mg-sized fragments are ho...

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Bibliographic Details
Main Authors: Schmidt, Sebastian (Author) , Schmitt, Axel Karl (Author) , Cionoiu, Katharina (Author) , McKeegan, Kevin D. (Author) , Bindeman, Ilya (Author) , Rocco, Tommaso Di (Author) , Pack, Andreas (Author)
Other Authors: Hertwig, Andreas (Other)
Format: Article (Journal)
Language:English
Published: 2024
In: Journal of analytical atomic spectrometry
Year: 2024, Volume: 39, Issue: 2, Pages: 439-446
ISSN:1364-5544
DOI:10.1039/D3JA00229B
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1039/D3JA00229B
Verlag, lizenzpflichtig, Volltext: https://pubs.rsc.org/en/content/articlelanding/2024/ja/d3ja00229b
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Author Notes:Sebastian Schmidt, Andreas Hertwig, Axel Karl Schmitt, Katharina Cionoiu, Kevin D. McKeegan, Ilya Bindeman, Tommaso Di Rocco, Andreas Pack
Description
Summary:A synthetic laser ruby crystal (HD-LR1) is introduced as a new matrix-matched reference material for secondary ionization mass spectrometry (SIMS) analysis of oxygen isotopes in corundum. Laser fluorination isotope ratio mass spectrometry (LF-IRMS) bulk analyses of multiple mg-sized fragments are homogenous, averaging δ18O = +18.40 ± 0.14‰ (95% confidence interval, n = 23) and Δ′17O = −0.368 ± 0.005‰ (as deviation from slope 0.528 for δ′17O vs. δ′18O at 95% conf., n = 11) relative to Vienna Standard Mean Ocean Water (V-SMOW). SIMS spot analyses show homogeneous O-isotopic values at the ng-scale independent of the location in the HD-LR1 single crystal and in four different crystallographic orientations. However, sample surface topography as an artefact of polishing corundum embedded in epoxy creates excess variability in δ18O within ∼100 μm from the edges of the grains. HD-LR1 is a chemical pure crystal with only Cr as a trace component detected at 276 μg g−1 by EPMA, whereas Be, often introduced in artificial gem enhancement, is <0.002 μg g−1 based on SIMS analyses. Therefore, HD-LR1 can also be used as a reference material for Cr, or as a blank for other trace element analyses of corundum by SIMS or LA-ICP-MS.
Item Description:Zuerst veröffentlicht: 07. Dezember 2023
Gesehen am 07.05.2024
Physical Description:Online Resource
ISSN:1364-5544
DOI:10.1039/D3JA00229B

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