Pb isotopic analysis of standards and samples using a 207 Pb– 204 Pb double spike and thallium to correct for mass bias with a double-focusing MC-ICP-MS
作者: Joel BakerDavid PeateTod WaightChristine Meyzen
作者单位: 1Danish Lithosphere Centre, Øster Voldgade 10, 1350 Copenhagen, Denmark
2School of Earth Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, New Zealand
3Department of Geoscience, University of Iowa, 121 Trowbridge Hall, Iowa City, IA 52242, United States of America
4Geological Institute, University of Copenhagen, Øster Voldgade 10, 1350 Copenhagen, Denmark
刊名: Chemical Geology, 2004, Vol.211 (3), pp.275-303
来源数据库: Elsevier Journal
DOI: 10.1016/j.chemgeo.2004.06.030
关键词: Pb isotopesMC-ICP-MSDouble spikeThalliumMass biasSRM 981SRM 982Standard reference materialsSRM 610SRM 612SRM 614AGV-1AGV-2BHVO-1BHVO-2BCR-1BCR-2JB-2BIR-1BE-NNOD-A-1NOD-P-1Iceland
原始语种摘要: Abstract(#br)A Pb isotope analytical method using a 207 Pb– 204 Pb double spike (DS) and a double-focusing MC-ICP-MS routinely yields standard and sample data with an external reproducibility <100 ppm for all Pb isotope ratios. With modest increases in analysis times (<10 min), external reproducibility of ≤50 ppm is attainable, e.g., SRM 981— 206 Pb/ 204 Pb=16.9418±6; 207 Pb/ 204 Pb=15.5000±6; 208 Pb/ 204 Pb=36.7265±19 ( n =26; 2 S.D.). This is achievable even when unspiked and spiked runs are analysed sequentially, demonstrating that memory due to use of the DS can be easily overcome by short and careful washout routines coupled with on-peak zeroes measurements. Replicate analyses of three mixtures of SRM 981 and SRM 982, in variable proportions, lie within 42 ppm of a mixing line...
全文获取路径: Elsevier  (合作)
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来源刊物:
影响因子:3.154 (2012)

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关键词翻译
关键词翻译
  • standards 规程
  • thallium 
  • isotopic 同位素置换
  • spike 示踪物
  • reference 基准电压源
  • analysis 分析
  • double 双重的
  • isotope 同位素
  • over 在上方
  • focusing