連続フロー型質量分析計による固体試料の炭素・硫黄同位体比分析 : 高精度分析のための改善点

• 丸岡 照幸

  筑波大学大学院生命環境科学研究科生命共存科学専攻

書誌事項

タイトル別名

• Isotope analysis of carbon and sulfur in solid materials using continuous-flow isotope ratio mass spectrometer: Improvements for high-precision analysis
• レンゾク フローガタ シツリョウ ブンセキケイ ニ ヨル コタイ シリョウ ノ タンソ イオウ ドウイタイヒ ブンセキ コウセイド ブンセキ ノ タメノ カイゼンテン

抄録

Continuous flow isotope ratio mass spectrometry (CF-IRMS) has significant advantages over the classic off-line methods in terms of high sensitivity and short analytical time. These advantages play an important role in expansion of its application to many scientific fields. However, the precision for isotope analysis by CF-IRMS has been believed to be lower than that of the off-line methods. In this study, a detailed evaluation of the performance of CF-IRMS for carbon and sulfur isotope analysis for solid materials is reported. High-precision, similar to the offline methods (within ±0.1 ‰), was achieved for carbon isotope analyses after the following improvements: (1) stabilization of room temperature (within ±0.1℃ in 10 minutes). (2) minimization of the non-linearity effect (i.e., pressure effect for instrumental isotopic fracionation) by the adjustment to a proper ion-repeller voltage. (3) reduction of background gas by using pre-heated tin capsules and high-grade helium and oxygen. In addition to the improvements mentioned above, high-precision isotope analyses (within ±0.1 ‰) of sulfur in solid materials require the following improvements: (1) stabilization of reference gas pressure by installing a centrifuge fan to properly exhaust the reference gas. (2) equilibrium of oxygen isotopes using a tube filled with quartz wool. (3) minimization of a memory effect by using polytetrafluoroethylene (PTFE) tubes and a PTFE gas-chromatography column. (4) use of V₂O₅ with a low sulfur content.

収録刊行物

• 地球化学

  地球化学 42 (4), 201-216, 2008

  一般社団法人日本地球化学会

キーワード

• continuous-flow isotope ratiomass spectrometer (CF-IRMS)
• elemental analyzer (EA)

詳細情報

• CRID: 1390282680718576000
• NII論文ID: 110009442242
• NII書誌ID: AN00141280
• DOI: 10.14934/chikyukagaku.42.201
• ISSN: 21885923
• ISSN: 03864073
• NDL書誌ID: 9785360
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9785360
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可