Carbonate clumped isotope analysis (Δ 47 ) of 21 carbonate standards determined via gas‐source isotope‐ratio mass spectrometry on four instrumental configurations using carbonate‐based standardization and multiyear data sets
[1];
[1];
- Department of Earth, Planetary, and Space Sciences, Department of Atmospheric and Oceanic Sciences Institute of the Environment and Sustainability, Center for Diverse Leadership in Science, University of California Los Angeles California
- Department of Earth, Planetary, and Space Sciences, Department of Atmospheric and Oceanic Sciences Institute of the Environment and Sustainability, Center for Diverse Leadership in Science, University of California Los Angeles California, Department of Geological Sciences California State University Northridge California
- Department of Earth, Planetary, and Space Sciences, Department of Atmospheric and Oceanic Sciences Institute of the Environment and Sustainability, Center for Diverse Leadership in Science, University of California Los Angeles California, GSI Environmental Inc Irvine California
- Department of Earth, Planetary, and Space Sciences, Department of Atmospheric and Oceanic Sciences Institute of the Environment and Sustainability, Center for Diverse Leadership in Science, University of California Los Angeles California, School of Earth and Environmental Sciences The University of Queensland St Lucia Queensland Australia
- Department of Earth, Planetary, and Space Sciences, Department of Atmospheric and Oceanic Sciences Institute of the Environment and Sustainability, Center for Diverse Leadership in Science, University of California Los Angeles California, Biological Sciences Department State University of New York Cortland New York
- Department of Earth, Planetary, and Space Sciences, Department of Atmospheric and Oceanic Sciences Institute of the Environment and Sustainability, Center for Diverse Leadership in Science, University of California Los Angeles California, Environmental Studies Program Department of Environmental Studies, University of Southern California Los Angeles California
- Department of Earth, Planetary, and Space Sciences, Department of Atmospheric and Oceanic Sciences Institute of the Environment and Sustainability, Center for Diverse Leadership in Science, University of California Los Angeles California, Geological Sciences Department California State University Fullerton Fullerton California
Rationale Clumped isotope geochemistry examines the pairing or clumping of heavy isotopes in molecules and provides information about the thermodynamic and kinetic controls on their formation. The first clumped isotope measurements of carbonate minerals were first published 15 years ago, and since then, interlaboratory offsets have been observed, and laboratory and community practices for measurement, data analysis, and instrumentation have evolved. Here we briefly review historical and recent developments for measurements, share Tripati Lab practices for four different instrument configurations, test a recently published proposal for carbonate‐based standardization on multiple instruments using multi‐year data sets, and report values for 21 different carbonate standards that allow for recalculations of previously published data sets. Methods We examine data from 4628 standard measurements on Thermo MAT 253 and Nu Perspective IS mass spectrometers, using a common acid bath (90°C) and small‐sample (70°C) individual reaction vessels. Each configuration was investigated by treating some standards as anchors (working standards) and the remainder as unknowns (consistency standards). Results We show that different acid digestion systems and mass spectrometer models yield indistinguishable results when instrument drift is well characterized. For linearity correction, mixed gas‐and‐carbonate standardization or carbonate‐only standardization yields similar results. No difference is observed in the use of three or eight working standards for the construction of transfer functions. Conclusions We show that all configurations yield similar results if instrument drift is robustly characterized and validate a recent proposal for carbonate‐based standardization using large multiyear data sets. Δ 47 values are reported for 21 carbonate standards on both the absolute reference frame (ARF; also refered to as the Carbon Dioxide Equilibrated Scale or CDES) and the new InterCarb‐Carbon Dioxide Equilibrium Scale (I‐CDES) reference frame, facilitating intercomparison of data from a diversity of labs and instrument configurations and restandardization of a broad range of sample sets between 2006, when the first carbonate measurements were published, and the present.
- Research Organization:
- Univ. of California, Los Angeles, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- DOE BES grant DE‐FG02‐13ER16402; SC0010288; FG02-13ER16402
- OSTI ID:
- 1810425
- Alternate ID(s):
- OSTI ID: 1810428; OSTI ID: 1851339
- Journal Information:
- Rapid Communications in Mass Spectrometry, Journal Name: Rapid Communications in Mass Spectrometry Vol. 35 Journal Issue: 17; ISSN 0951-4198
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- United Kingdom
- Language:
- English
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