期刊文献+

高精度正热电离质谱法测定Br同位素 被引量:3

The High Precision Isotopic Measurement of Bromine by Thermal Ionization Mass Spectrometry
下载PDF
导出
摘要 本文对Cs_2Br^+正热电离质谱分析法测定Br同位素进行了研究,通过实验建立了最佳分析条件,将样品涂在加有石墨的钽带上,能使由CsBr发射出的Cs_2Br^+离子强度大为增加,对化学试剂KBr中Br同位素丰度比的测定值为1.02654±0.00012,其精度为0.011%(95%的置信水平),测定结果表明:几种不同来源的溴化物中,Br同位素存在可观察的差异。 A procedure for the determination of the bromine isotopic ratio by using positive thermal ionization mass spectrometry of the Cs_2Br^+ ion has been investigated. The intensity of Cs_2Br^+ emitted from CsBr is considerably enhanced by the addition of graphite to the filament substrate during loading. Optimal conditions for measurement have been established. The bromine isotopic compositions. ^(79)Br/^(81)Br. in KBr chemical reagents have been measured to be 1.02654±0.00012 with a precision of 0.011%(95% confidence Limit). The Isotopic ratios of bromine in bromides of the different origins hay also been measured and a significant variance of bromine isotopic composition has been observed.
出处 《盐湖研究》 CSCD 1993年第3期57-61,共5页 Journal of Salt Lake Research
关键词 同位素 质谱法 精度 盐湖 Bromine isotopes, Mass spectrometry
  • 引文网络
  • 相关文献

同被引文献65

  • 1Stewart M A, Spivack A J. The Stable-chlorine Isotope Corn positions of Natural and Anthropogenic Materials[J]. Reviews in Mineralogy and Geochemistry, 2004,55 (1) : 231-254.
  • 2Stotler R L,Frape S K,Shouakar-Stash O. An Isotopic Survey of 8 81Br and 8 aTC1 of Dissolved Halides in the Canadian and Fennoscandian Shields [J]. Chemical Geology, 2010, 274(1/2): 38-55.
  • 3Eggenkamp H G M,Coleman M L. The Effect of Aqueous Diffusion on the Fraetionation of Chlorine and Bromine Stable Isotopes [ J]. Geochimica et Cosmochimica Acta, 2009, 73 (12) : 3539-3548.
  • 4Canfield D E. Isotope Fractionation by Natural Populations of Sulfate reducing Bacteria [ J]. Geochimiea et Cosmochimiea Acta, 2001,65(7) : 1117-1124.
  • 5Silva S R,Kendall C,Wilkison D H,et al. A New Method for Collection of Nitrate from Fresh Water and the Analysis of Nitrogen and Oxygen Isotope Ratios[J]. Journal of Hydrolo- gy, 2000,228(1/2) : 22-36.
  • 6Bottinga Y. Calculation of Fractionation Factors for Carbon and Oxygen Isotopic Exchange in the System Calcite-carbon Dioxide water[J]. The Journal of Physical Chemistry, 1968, 72(3) : 800-808.
  • 7Shouakar stash O, Frape S K, Hobbs M Y, et al. Origin and Evolution of Waters from Paleozoie Formations, Southern On tario,Canada: Additional Evidence from o37Cl and o81Br Iso-topic Signatures[C]//Bullen T D, Wang Y. 12th International Symposium on Water-rock Interaction, Kunming, China. Lon- don: Taylor and Francis Limited, 2007:537-541.
  • 8Shouakar-Stash O, Alexeev S V, Frape S K, et al. Geochemis try and Stable Isotopic Signatures, Including Chlorine and Bromine Isotopes, of the Deep Groundwaters of the Siberian Platform, Russia[J]. Applied Geochemistry, 2007,22 (3) : 589- 605.
  • 9Frape S K, Shouakar-Stash O, Paces T, et al. Geochemical and Isotopic Characteristics of the Waters from Crystalline and Sedimentary Structures of the Bohemian Massif[C]//Bullen T D, Wang Y. 12th International Symposium on Water-rock Interaction, Kunming, China. London: Taylor and FrancisLimited,2007:727-733.
  • 10Stotler R L,Frape S K,Shouakar-Stash O,et al. Methane halide Reactions in Shield Waters, Inferred from o13C and o2 H of Methane and o81Br and o37C1 of Dissolved Ions[J]. Geochimica et Cosmochimica Acta, 2006,70 (18) : A619.

引证文献3

二级引证文献5

相关主题

;
使用帮助 返回顶部