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Journal of Earth Science

, Volume 29, Issue 1, pp 223–229 | Cite as

A Fast Separation Method for Isotope Analysis Based on Compressed Nitrogen Gas and Ion-Exchange Chromatography Technique—A Case Study of Sr-Nd Isotope Measurement

  • Honglin Yuan
  • Xu Liu
  • Zhian Bao
  • Kaiyun Chen
  • Chunlei Zong
Isotope Geochronology
  • 37 Downloads

Abstract

High-purity N2 was used to increase the mobile phase flow rate during ion purification of ion-exchange resin. This was performed to improve the efficiency of isotope separation and purification, and to meet the efficiency requirements of rapid multiple-collector-inductively coupled plasma mass spectrometry (MC-ICPMS) analysis. For Cu isotope separation, our results indicated that at a gas flow rate >60 mL/min, the separation chromatographic peaks broadened and the recovery rate decreased to <99.2%. On the other hand, no significant change in the Cu peaks was observed at a gas flow rate of 20 mL/min and the recovery rate was determined to be >99.9%. The Cu isotope ratio, measured by the standard-sample bracketing method, agreed with reference data within a ±2 SD error range. The separation time was reduced from the traditional 10 h (without N2) to 4 h (with N2), indicating that the efficiency was more than doubled. Moreover, Sr and Nd isotope separation in AGV-2 (US Geological Survey andesite standard sample) accelerated with a 20 mL/min gas flow, demonstrating that with the passage of N2, the purified liquid comprised Rb/Sr and Sm/Nd ratios of <0.000 049 and <0.000 001 5, respectively. This indicated an effective separation of Rb from Sr and Sm from Nd. MC-ICPMS could therefore be applied to accurately determine Sr and Nd isotope ratios. The results afforded were consistent with the reference data within a ±2 SD error range and the total separation time was shortened from 2 d to <10 h.

Key words

fast isotope purification MC-ICPMS N2 gas flow Cu isotope Sr-Nd isotopes 

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Notes

Acknowledgments

This work was co-supported by the National Natural Science Foundation of China (Nos. 41427804, 41421002, 41373004), Program for Changjiang Scholars and Innovative Research Team in University of China (No. IRT1281), and the MOST Research Foundation from the State Key Laboratory of Continental Dynamics. The final publication is available at Springer via https://doi.org/10.1007/s12583-017-0944-0.

References Cited

  1. Bast, R., Scherer, E. E., Sprung, P., et al., 2015. A Rapid and Efficient Ion-Exchange Chromatography for Lu-Hf, Sm-Nd, and Rb-Sr Geochronology and the Routine Isotope Analysis of Sub-Ng Amounts of Hf by MC-ICP-MS. Journal of Analytical Atomic Spectrometry, 30(11): 2323–2333. https://doi.org/10.13039/501100001659CrossRefGoogle Scholar
  2. Beard, B. L., Johnson, C. M., Skulan, J. L., et al., 2003. Application of Fe Isotopes to Tracing the Geochemical and Biological Cycling of Fe. Chemical Geology, 195(1/2/3/4): 87–117. https://doi.org/10.1016/s0009-2541(02)00390-xCrossRefGoogle Scholar
  3. Bizzarro, M., Baker, J. A., Ulfbeck, D., 2003. A New Digestion and Chemical Separation Technique for Rapid and Highly Reproducible Determination of Lu/Hf and Hf Isotope Ratios in Geological Materials by MC-ICP-MS. Geostandards and Geoanalytical Research, 27(2): 133–145. https://doi.org/10.1111/j.1751-908x.2003.tb00641.xCrossRefGoogle Scholar
  4. Blättler, C. L., Higgins, J. A., 2014. Calcium Isotopes in Evaporites Record Variations in Phanerozoic Seawater SO4 and Ca. Geology, 42(8): 711–714. https://doi.org/10.1130/g35721.1CrossRefGoogle Scholar
  5. Blichert-Toft, J., Chauvel, C., Albarède, F., 1997. Separation of Hf and Lu for High-Precision Isotope Analysis of Rock Samples by Magnetic Sector-Multiple Collector ICP-MS. Contributions to Mineralogy and Petrology, 127(3): 248–260. https://doi.org/10.1007/s004100050278CrossRefGoogle Scholar
  6. Blichert-Toft, J., 2001. On the Lu-Hf Isotope Geochemistry of Silicate Rocks. Geostandards and Geoanalytical Research, 25(1): 41–56. https://doi.org/10.1111/j.1751-908x.2001.tb00786.xCrossRefGoogle Scholar
  7. Dong, S. F., Wasylenki, L. E., 2016. Zinc Isotope Fractionation during Adsorption to Calcite at High and Low Ionic Strength. Chemical Geology, 447: 70–78. https://doi.org/10.1016/j.chemgeo.2016.10.031CrossRefGoogle Scholar
  8. Enge, T. G., Field, M. P., Jolley, D. F., et al., 2016. An Automated Chromatography Procedure Optimized for Analysis of Stable Cu Isotopes from Biological Materials. Journal of Analytical Atomic Spectrometry, 31(10): 2023–2030. https://doi.org/10.1039/c6ja00120cCrossRefGoogle Scholar
  9. Field, M. P., Romaniello, S. J., Gordon, G. W., et al., 2012. Automated Sample Preparation for Radiogenic and Non-Traditional Metal Isotope Analysis by MC-ICP-MS. American Geophysical Union, Fall Meeting, December, 2012, San Francisco. Abstract #V23B-2823Google Scholar
  10. Gao, T., Ke, S., Teng, F. Z., et al., 2016. Magnesium Isotope Fractionation during Dolostone Weathering. Chemical Geology, 445: 14–23. https://doi.org/10.13039/501100001809CrossRefGoogle Scholar
  11. Halliday, A. N., Lee, D. C., Christensen, J. N., et al., 1995. Recent Developments in Inductively Coupled Plasma Magnetic Sector Multiple Collector Mass Spectrometry. International Journal of Mass Spectrometry and Ion Processes, 146/147: 21–33. https://doi.org/10.1016/0168-1176(95)04200-5CrossRefGoogle Scholar
  12. Jochum, K. P., Nohl, U., Herwig, K., et al., 2005. GeoReM: A New Geochemical Database for Reference Materials and Isotopic Standards. Geostandards and Geoanalytical Research, 29(3): 333–338. https://doi.org/10.1111/j.1751-908x.2005.tb00904.xCrossRefGoogle Scholar
  13. Jochum, K. P., Weis, U., Schwager, B., et al., 2016. Reference Values Following ISO Guidelines for Frequently Requested Rock Reference Materials. Geostandards and Geoanalytical Research, 40(3): 333–350. https://doi.org/10.1111/j.1751-908x.2015.00392.xCrossRefGoogle Scholar
  14. Kleinhanns, I. C., Kreissig, K., Kamber, B. S., et al., 2002. Combined Chemical Separation of Lu, Hf, Sm, Nd, and REEs from a Single Rock Digest: Precise and Accurate Isotope Determinations of Lu-Hf and Sm-Nd Using Multicollector-ICPMS. Analytical Chemistry, 74(1): 67–73. https://doi.org/10.1021/ac010705zCrossRefGoogle Scholar
  15. Lapen, T. J., Mahlen, N. J., Johnson, C. M., et al., 2004. High Precision Lu and Hf Isotope Analyses of both Spiked and Unspiked Samples: A New Approach. Geochemistry, Geophysics, Geosystems, 5(1): 01010. https://doi.org/10.1029/2003gc000582CrossRefGoogle Scholar
  16. Li, C. F., Chu, Z.-Y., Guo, J.-H., et al., 2015. A Rapid Single Column Separation Scheme for High-Precision Sr-Nd-Pb Isotopic Analysis in Geological Samples Using Thermal Ionization Mass Spectrometry. Analytical Methods, 7(11): 4793–4802. https://doi.org/10.1039/c4ay02896aCrossRefGoogle Scholar
  17. Meynadier, L., Gorge, C., Birck, J. L., et al., 2006. Automated Separation of Sr from Natural Water Samples or Carbonate Rocks by High Performance Ion Chromatography. Chemical Geology, 227(1/2): 26–36. https://doi.org/10.1016/j.chemgeo.2005.05.012CrossRefGoogle Scholar
  18. Münker, C., Weyer, S., Scherer, E., et al., 2001. Separation of High Field Strength Elements (Nb, Ta, Zr, Hf) and Lu from Rock Samples for MC-ICPMS Measurements. Geochemistry, Geophysics, Geosystems, 2(12): 2001GC000183. https://doi.org/10.1029/2001gc000183CrossRefGoogle Scholar
  19. Romaniello, S. J., Field, M. P., Smith, H. B., et al., 2015. Fully Automated Chromatographic Purification of Sr and Ca for Isotopic Analysis. Journal of Analytical Atomic Spectrometry, 30(9): 1906–1912. https://doi.org/10.13039/100000104CrossRefGoogle Scholar
  20. Ryu, J.-S., Vigier, N., Decarreau, A., et al., 2016. Experimental Investigation of Mg Isotope Fractionation during Mineral Dissolution and Clay Formation. Chemical Geology, 445: 135–145. https://doi.org/10.13039/501100003716CrossRefGoogle Scholar
  21. Salters, V. J. M., 1994. 176Hf/177Hf Determination in Small Samples by a High-Temperature SIMS Technique. Analytical Chemistry, 66(23): 4186–4189. https://doi.org/10.1021/ac00095a012CrossRefGoogle Scholar
  22. Sikdar, J., Rai, V. K., 2017. Simultaneous Chromatographic Purification of Si and Mg for Isotopic Analyses Using MC-ICPMS. Journal of Analytical Atomic Spectrometry, 32(4): 822–833. https://doi.org/10.1039/c6ja00426aCrossRefGoogle Scholar
  23. Tanaka, T., Togashi, S., Kamioka, H., et al., 2000. JNdi-1: A Neodymium Isotopic Reference in Consistency with LaJolla Neodymium. Chemical Geology, 168(3/4): 279–281. https://doi.org/10.1016/s0009-2541(00)00198-4CrossRefGoogle Scholar
  24. Teng, F.-Z., Rudnick, R. L., McDonough, W. F., et al., 2009. Lithium Isotopic Systematics of A-Type Granites and Their Mafic Enclaves: Further Constraints on the Li Isotopic Composition of the Continental Crust. Chemical Geology, 262(3/4): 370–379. https://doi.org/10.1016/j.chemgeo.2009.02.009CrossRefGoogle Scholar
  25. Ulfbeck, D., Baker, J., Waight, T., et al., 2003. Rapid Sample Digestion by Fusion and Chemical Separation of Hf for Isotopic Analysis by MC-ICPMS. Talanta, 59(2): 365–373. https://doi.org/10.1016/s0039-9140(02)00525-8CrossRefGoogle Scholar
  26. Yang, Y.-H., Zhang, H.-F., Chu, Z.-Y., et al., 2010. Combined Chemical Separation of Lu, Hf, Rb, Sr, Sm and Nd from a Single Rock Digest and Precise and Accurate Isotope Determinations of Lu-Hf, Rb-Sr and Sm-Nd Isotope Systems Using Multi-Collector ICP-MS and TIMS. International Journal of Mass Spectrometry, 290(2/3): 120–126. https://doi.org/10.1016/j.ijms.2009.12.011CrossRefGoogle Scholar
  27. Yuan, H. L., Yuan, W. T., Bao, Z. A., et al., 2017. Development of Two New Copper Isotope Standard Solutions and Their Copper Isotopic Compositions. Geostandards and Geoanalytical Research, 41(1): 77–84. https://doi.org/10.13039/501100001809CrossRefGoogle Scholar
  28. Zheng, X.-Y., Beard, B. L., Lee, S., et al., 2017. Contrasting Particle Size Distributions and Fe Isotope Fractionations during Nanosecond and Femtosecond Laser Ablation of Fe Minerals: Implications for LA-MC-ICP-MS Analysis of Stable Isotopes. Chemical Geology, 450: 235–247. https://doi.org/10.1016/j.chemgeo.2016.12.038CrossRefGoogle Scholar
  29. Zhu, C., Liu, Z. Y., Zhang, Y. L., et al., 2016. Measuring Silicate Mineral Dissolution Rates Using Si Isotope Doping. Chemical Geology, 445: 146–163. https://doi.org/10.13039/501100004835CrossRefGoogle Scholar

Copyright information

© China University of Geosciences and Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.State Key Laboratory of Continental Dynamics, Department of GeologyNorthwest UniversityXi’anChina
  2. 2.Collaborative Innovation Center of Continental TectonicsXi’anChina
  3. 3.College of Chemistry and Materials ScienceNorthwest UniversityXi’anChina

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