Fully resolved high-precision measurement of 36 S for sulfur reference materials.
Autor: | Sun J; Department of Geology, University of Maryland, College Park, Maryland, USA., Farquhar J; Department of Geology, University of Maryland, College Park, Maryland, USA.; Earth System Science Interdisciplinary Center, University of Maryland, College Park, Maryland, USA. |
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Jazyk: | angličtina |
Zdroj: | Rapid communications in mass spectrometry : RCM [Rapid Commun Mass Spectrom] 2024 Jul 30; Vol. 38 (14), pp. e9768. |
DOI: | 10.1002/rcm.9768 |
Abstrakt: | Rationale: Advances in sulfur isotope measurement techniques have led to increased analytical precision. However, accurate measurement of 36 S remains a challenge. This difficulty arises primarily from unresolved isobaric interferences of 36 SF Methods: Our study develops an interference-free four-sulfur isotope measurement method by using the high-resolution mass spectrometer Panorama. The mass resolving power of Panorama allows the distinction of 186 WF Results: The 186 WF Conclusion: The measurement discrepancies on 36 S between Panorama and MAT 253 highlight the impact of scale compression due to unresolved isobaric interferences. Resolving this problem is crucial for accurate 36 S analysis. We recommend replacing the filament material with rhenium, tuning the filament voltage, and avoiding carbon in instruments to eliminate or mitigate interferences. We propose future systematic efforts to calibrate the δ 33 S, δ 34 S, and δ 36 S of IAEA-S-1, IAEA-S-2, and IAEA-S-3 and advise bracketing all three reference materials in the measurement sequences, to enable calibration. (© 2024 The Authors. Rapid Communications in Mass Spectrometry published by John Wiley & Sons Ltd.) |
Databáze: | MEDLINE |
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