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Carbonates and Evaporites

, Volume 32, Issue 1, pp 117–122 | Cite as

Analytical validation on carbon and oxygen isotopic measurement of small carbonate samples by using IsoPrime100 mass spectrometer

  • Yumiko Watanabe
  • Takahiro Tagami
Short Communication
  • 111 Downloads

Abstract

This paper focused on analytical validation such as the amount needed, time drift, repeatability, memory effect, analytical precision and accuracy on carbon/oxygen isotopic measurement of small carbonate samples (10–80 µg) using an IsoPrime100 mass spectrometer. 10 µg of carbonate samples yielded mass 44-intensity of 2 nA. The minimum amount needed was 10 μg and the repeatability was around 0.1 ‰ (1 s.d.). Through 24-h measurement there was no temporal variation of δ13C, but that of δ18O showed variation with decreasing the amount of CO2 reference gas, suggesting that δ18O values need to conduct time drift correction. Inter-sample memory effect was not observed, indicating that IsoPrime100 mass spectrometer with CO2 purification system is adequately evacuated after each analysis by means of pumping system. Moreover, IAEA-CO-1 and JAMSTEC-WS values calibrated by international reference NBS19 agree within error with the reference values, demonstrating the accuracy of our analytical procedure on carbon/oxygen isotopic measurement of carbonate samples. This paper offers insights into analytical validation procedure when setting up a mass spectrometer on isotopic analyses of small carbonate samples.

Keywords

Carbonate Carbon isotopes Oxygen isotopes Validation Mass spectrometry 

Notes

Acknowledgments

We are grateful to Dr. S. Sakai (JAMSTEC) for useful comments related to experimental techniques. We appreciate Geological and Nuclear Science Ltd for the measurement of JAMSTEC-WS isotopic data. This study was supported by Program for Next Generation World-Leading Researchers of the Japan Society for the Promotion of Science (NEXT Program; GR063).

Compliance with ethical standards

Funding

This study was supported by Program for Next Generation World-Leading Researchers of the Japan Society for the Promotion of Science (NEXT Program; GR063).

Conflict of interest

The authors declare that they have no conflict of interest.

References

  1. Breitenbach SFM, Bernasconi SM (2011) Carbon and oxygen isotope analysis of small carbonate samples (20 to 100 μg) with a GasBench II preparation device. Rapid Commun Mass Spectrom 25:1910–1914CrossRefGoogle Scholar
  2. Coplen TB, Brand WA, Gehre M, Gröning M, Meijer HAJ, Toman B, Verkouteren RM (2006) New guidelines for 13C measurements. Anal Chem 78:2439–2441CrossRefGoogle Scholar
  3. Fiebig J, Schöne BR, Oschman W (2005) High-precision oxygen and carbon isotope analysis of very small (10–30 μg) amounts of carbonates using continuous flow isotope ratio mass spectrometry. Rapid Commun Mass Spectrom 19:2355–2358CrossRefGoogle Scholar
  4. Hori M, Takashima C, Matsuoka J, Kano A (2009) Carbon and oxygen stable isotopic measurements of carbonate and water samples using mass spectrometer with gas bench. Bull Grad School Soc Cult Stud Kyushu Univ 15:51–57Google Scholar
  5. Ishimura T, Tsunogai U, Nakagawa F (2008) Grain-scale heterogeneities in the stable carbon and oxygen isotopic compositions of the international standard calcite materials (NBS 19, NBS 18, IAEA-CO-1, and IAEA-CO-8). Rapid Commun Mass Spectrom 22:1925–1932CrossRefGoogle Scholar
  6. Stichler W (1995) Interlaboratory comparison of new materials for carbon and oxygen ratio measurements. In: Proceedings of a consultants meeting held in Vienna. IAEA-TECDOC-825, pp 67–74Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Division of Earth and Planetary SciencesGraduate School of Science, Kyoto UniversityKyotoJapan

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