加速器質量分析計による^<14>C測定のための海水溶存無機炭素真空抽出法

• 土屋 理恵

• 和田 秀樹

書誌事項

タイトル別名

• Vacuum CO_2 extraction method from seawater for AMS ^<14>C analysis
• カソク キ シツリョウ ブンセキケイ ニ ヨル 14C ソクテイ ノ タメ ノ カイスイ ヨウゾン ムキ タンソ シンクウ チュウシュツホウ

抄録

We have established a method for total inorganic carbon(〓CO_2) extraction from seawater using a vacuum system for radiocarbon content analysis using an Accelerator Mass Spectrometry (AMS). In this method, phosphoric acid is added to the seawater sample and 〓CO_2 is extracted with ultrasonic washer. After this operation, the extracted gas is purified cryogenically to CO_2 using Horibe traps set with n-pentane (-130℃) and liquid nitrogen (-196℃) to remove H_2O. The collected CO_2 is reacted with H_2 and converted to graphite. The yield of CO_2 extracted from seawater is about 99.8%. The radiocarbon isotopic accuracy of this method is espected to be better than ±0.04‰ in Δ ^<l4>C. Stable carbon isotopic composition (δ^<l3>C) of residual 〓CO_2 in the sample is almost identical with that of initial extraction.

収録刊行物

• 静岡大学地球科学研究報告

  静岡大学地球科学研究報告 29 113-118, 2002-07

  静岡大学地球科学教室

キーワード

• 〓CO_2 extraction
• vacuum system
• ^<l4>C
• seawater
• 452

詳細情報

• CRID: 1390290699779394432
• NII論文ID: http://ci.nii.ac.jp/naid/110000413420
• NII論文ID: 110000413420
• NII書誌ID: AN00103190
• ISSN: 03886298
• DOI: 10.14945/00000381
• NDL書誌ID: 6385966
• Web Site: http://hdl.handle.net/10297/381
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6385966
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • IRDB
  • NDL
  • CiNii Articles