@article{oai:nagoya.repo.nii.ac.jp:00014620, author = {中村, 俊夫 and 太田, 友子 and Nakamura, Toshio and Ohta, Tomoko}, journal = {名古屋大学加速器質量分析計業績報告書}, month = {Mar}, note = {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.}, pages = {219--224}, title = {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}, volume = {22}, year = {2011} }