Stable carbon and oxygen isotope analyses of carbonate using a continuous flow isotope ratio mass spectrometry

• Moriya Kazuyoshi

• Goto Akiko S

• Hasegawa Takashi

• 守屋 和佳

• 後藤 晶子

• 長谷川 卓

抄録

Basic performance of a continuous-flow isotope ratio mass spectrometer (Thermo Scientific GasBench II and Delta V Advantage) installed in the laboratory of evolution of earth environment of Kanazawa University is examined by multiple analyses of standard reference materials (NBS19, LSVEC, etc.). Internal precision of Delta V Advantage determined by 10 consecutive analyses of online reference CO₂ gas is 0.01 ‰ for both δ¹³C and δ¹⁸O values. Internal precision of GasBench II inlet system coupled to Delta V Advantage examined by four CO₂ gas aliquots, which is evolved by a reaction of 300 µg of NBS19 and anhydrous phosphoric acid, is 0.06 ‰and 0.08 ‰ for δ¹³C and δ¹⁸O, respectively. External precision of the system determined by 20 consecutive NBS19 analyses over 16 hours within the same day represents 0.02 ‰and 0.04 ‰ for δ¹³C and δ¹⁸O, respectively. A peak area of the first sample aliquot on a chromatogram detected on Delta V Advantage significantly correlates with amount of carbonate reacted (r = 0.99, p << 0.01). This positive correlation indicates that amount of carbonate within a given sample can be estimated from the chromatogram within an error of ±30 µg, which enable us to determine carbonate content of the bulk samples in at least better than 10 % precision.

収録刊行物

• The science reports of the Kanazawa University = 金沢大学理科報告

  The science reports of the Kanazawa University = 金沢大学理科報告 56 45-58, 2012-01-01

  Institute of Science and Engineering, Kanazawa University = 金沢大学

キーワード

• stable isotopes
• carbonate
• CF-IRMS
• GasBench

詳細情報

• CRID: 1390857368736166912
• NII論文ID: 120005307436
• NII書誌ID: AA00835991
• ISSN: 00228338
• DOI: 10.24517/00011117
• Web Site: http://hdl.handle.net/2297/35196
• 本文言語コード: en
• データソース種別:
  • JaLC
  • IRDB
  • CiNii Articles