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Single-step chromatographic isolation of lithium from whole-rock carbonate and clay for isotopic analysis with multi-collector ICP-mass spectrometry

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Abstract
Lithium isotope ratios play a key role in tracing weathering processes within the context of paleoclimatologic research. Therefore, accurate and precise determination of the isotopic composition of Li is required for a large variety of complex geological samples with widely different Li contents. This technical note describes the extension and fine-tuning of the existing cation exchange chromatographic procedures for isolation of Li to whole-rock carbonate and clay matrices prior to its isotopic analysis via multi-collector ICP-mass spectrometry. The method developed permits the isolation of >= 20 ng amounts of Li from carbonates and clays, by using a 25 cm long cylindrical column loaded with 8 and 2 mL of AG-50W-X8 cation exchange resin, respectively. A 0.5 M HCl solution is used as eluent. Li recoveries >= 99% were achieved and isotopic analysis using 10-20 ng of isolated Li resulted in accurate and precise delta Li-7 values - external precision (2SE) of 0.2 parts per thousand (N = 15). The analytical procedures developed allow Li isotope ratios to be investigated in parallel in both the clay and carbonate fractions of a geological sample within the context of paleoclimatological research.
Keywords
PRECISE DETERMINATION, SAMPLES, LI, TRACER, BEHAVIOR, SEAWATER

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MLA
Van Hoecke, Karen, et al. “Single-Step Chromatographic Isolation of Lithium from Whole-Rock Carbonate and Clay for Isotopic Analysis with Multi-Collector ICP-Mass Spectrometry.” JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, vol. 30, no. 12, 2015, pp. 2533–40, doi:10.1039/c5ja00165j.
APA
Van Hoecke, K., Belza, J., Croymans-Plaghki, T., Misra, S., Claeys, P., & Vanhaecke, F. (2015). Single-step chromatographic isolation of lithium from whole-rock carbonate and clay for isotopic analysis with multi-collector ICP-mass spectrometry. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 30(12), 2533–2540. https://doi.org/10.1039/c5ja00165j
Chicago author-date
Van Hoecke, Karen, J Belza, Tom Croymans-Plaghki, S Misra, P Claeys, and Frank Vanhaecke. 2015. “Single-Step Chromatographic Isolation of Lithium from Whole-Rock Carbonate and Clay for Isotopic Analysis with Multi-Collector ICP-Mass Spectrometry.” JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 30 (12): 2533–40. https://doi.org/10.1039/c5ja00165j.
Chicago author-date (all authors)
Van Hoecke, Karen, J Belza, Tom Croymans-Plaghki, S Misra, P Claeys, and Frank Vanhaecke. 2015. “Single-Step Chromatographic Isolation of Lithium from Whole-Rock Carbonate and Clay for Isotopic Analysis with Multi-Collector ICP-Mass Spectrometry.” JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 30 (12): 2533–2540. doi:10.1039/c5ja00165j.
Vancouver
1.
Van Hoecke K, Belza J, Croymans-Plaghki T, Misra S, Claeys P, Vanhaecke F. Single-step chromatographic isolation of lithium from whole-rock carbonate and clay for isotopic analysis with multi-collector ICP-mass spectrometry. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY. 2015;30(12):2533–40.
IEEE
[1]
K. Van Hoecke, J. Belza, T. Croymans-Plaghki, S. Misra, P. Claeys, and F. Vanhaecke, “Single-step chromatographic isolation of lithium from whole-rock carbonate and clay for isotopic analysis with multi-collector ICP-mass spectrometry,” JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, vol. 30, no. 12, pp. 2533–2540, 2015.
@article{7170735,
  abstract     = {{Lithium isotope ratios play a key role in tracing weathering processes within the context of paleoclimatologic research. Therefore, accurate and precise determination of the isotopic composition of Li is required for a large variety of complex geological samples with widely different Li contents. This technical note describes the extension and fine-tuning of the existing cation exchange chromatographic procedures for isolation of Li to whole-rock carbonate and clay matrices prior to its isotopic analysis via multi-collector ICP-mass spectrometry. The method developed permits the isolation of >= 20 ng amounts of Li from carbonates and clays, by using a 25 cm long cylindrical column loaded with 8 and 2 mL of AG-50W-X8 cation exchange resin, respectively. A 0.5 M HCl solution is used as eluent. Li recoveries >= 99% were achieved and isotopic analysis using 10-20 ng of isolated Li resulted in accurate and precise delta Li-7 values - external precision (2SE) of 0.2 parts per thousand (N = 15). The analytical procedures developed allow Li isotope ratios to be investigated in parallel in both the clay and carbonate fractions of a geological sample within the context of paleoclimatological research.}},
  author       = {{Van Hoecke, Karen and Belza, J and Croymans-Plaghki, Tom and Misra, S and Claeys, P and Vanhaecke, Frank}},
  issn         = {{0267-9477}},
  journal      = {{JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY}},
  keywords     = {{PRECISE DETERMINATION,SAMPLES,LI,TRACER,BEHAVIOR,SEAWATER}},
  language     = {{eng}},
  number       = {{12}},
  pages        = {{2533--2540}},
  title        = {{Single-step chromatographic isolation of lithium from whole-rock carbonate and clay for isotopic analysis with multi-collector ICP-mass spectrometry}},
  url          = {{http://doi.org/10.1039/c5ja00165j}},
  volume       = {{30}},
  year         = {{2015}},
}

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