Assessment of the secondary instrumental fractionation in TIMS: Implication for high-precision Nd isotope analysis of geological samples
作者: Ryota FukaiTetsuya Yokoyama
作者单位: 1Geochemical Research Center, Graduate School of Science, The University of Tokyo
2Department of Earth and Planetary Sciences, School of Science, Tokyo Institute of Technology
刊名: GEOCHEMICAL JOURNAL, 2019, Vol.53 (5), pp.333-337
来源数据库: J-STAGE Journals
DOI: 10.2343/geochemj.2.0569
关键词: NeodymiumΜ142NdΕNdTIMSIsotopic fractionation
原始语种摘要: The advent of the latest-generation of mass spectrometers enables the determination of isotope ratios for several elements with very high precision. However, many obscure processes deteriorate analytical uncertainties. We investigated a likely process, the secondary instrumental fractionation of Nd isotopes during thermal ionization mass spectrometry (TIMS) analysis, which cannot be ignored in recent geochemical applications. Multiple Nd isotope measurements of the standard JNdi-1 and nine terrestrial rocks standards reveal small but resolvable isotopic fluctuations. The variations are attributed to secondary instrumental fractionation induced by the accumulation of conductive materials (e.g., H3PO4) from samples, on the ion lens assemblage surface. The secondary instrumental...
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  • fractionation 分级
  • isotope 同位素
  • ratios 遗传比率
  • secondary 二次的
  • geological 地质的
  • analysis 分析
  • isotopic 同位素置换
  • instrumental 仪器的
  • geochemical 地球化学的
  • terrestrial 地上的