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claudia-bouman
Team TFS
Team TFS
Institute for Research on Earth Evolution (IFREE), Japan Agency for Marine-Earth
Journal of Analytical Atomic Spectrometry (2013), V28, pp945-957, doi: 10.1039/C3JA30329B
A new analytical bias correction for in situ Sr isotope analysis of plagioclase crystals using laser-ablation multiple-collector inductively coupled plasma mass spectrometry
Jun-Ichi Kimura, Toshiro Takahashi and Qing Chang
A new analytical protocol was developed for correcting baseline-induced biases during the analysis of Sr isotope ratios in plagioclase using excimer laser-ablation Aridus-dual-intake-system multiple-collector inductively coupled plasma mass spectrometry (LA-MC-ICP-MS). Residual analytical biases of 84Sr/86Sr and 87Sr/86Sr were observed after applying on-peak background subtractions and mass-fractionation corrections using the conventional 86Sr/88Sr exponential internal normalization. The residual biases occurred only for samples analysed with LA and not for solution analyses using Aridus with the same instrumental setup. Based on observations from the ablation of NaCl and olivine crystals, we concluded that this was due to suppression and enhancement of the Kr baseline by loading of the LA sample aerosols and by the introduction of Kr from the samples, respectively.
  • MC-ICPMS
  • Neptune
  • Sr isotopes
  • Laser ablation
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