2024-03-28T12:20:03Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00014620
2023-01-16T04:01:58Z
879:1183:1184:1395
Graphite formation and carbon-isotopic fractionation : Function of iron-powder catalyst and effect on fractionation by Sulfix treatment
グラファイト生成と炭素同位体比変動 : 鉄触媒とサルフィックス処理の効果
中村, 俊夫
83364
太田, 友子
83365
Nakamura, Toshio
83366
Ohta, Tomoko
83367
Sulfix
graphitization
carbon isotopic fractionation
carbon isotope ratio
サルフィックス
グラファイト生成
炭素同位体分別
炭素同位体比
2011-03
For AMS 14C dating, carbonaceous materials are combusted to carbon dioxide (CO2), and the CO2 is reduced to graphite by hydrogen in the presence of iron powder catalyst. This CO2 reduction to graphite is sometimes not successful, because of disturbance from the presence of halogen and sulfur oxides. To overcome this effect, halogen and sulfur oxides are removed from CO2 by a treatment with Sulfix. To investigate any changes in carbon isotope ratios of graphite produced by the additional Sulfix treatment, we conducted a test treatment on CO2 produced from both dead oxalic acid and NBS oxalic acid (HOxII l4C standard). The results suggested that no detectable effect was observed in carbon isotope ratios caused by the Sulfix treatment. If the sample CO2 is enough (>1.6mg), the carbon isotope ratios are not affected by the presence of the Sulfix treatment.
departmental bulletin paper
名古屋大学年代測定資料研究センター
2011-03
名古屋大学加速器質量分析計業績報告書
22
219
224
jpn