@article{oai:nagoya.repo.nii.ac.jp:00011501,
 author = {南, 雅代 and Minami, Masayo and 中村, 俊夫 and Nakamura, Toshio},
 journal = {名古屋大学加速器質量分析計業績報告書},
 month = {Mar},
 note = {Accurate radiocarbon (^<14>C) and carbon isotope analysis on fossil bones require that all exogenous carbon be removed. To eliminate the foreign organic matter from bones, XAD-2 chromatography method was tested. The fossil bones used in the experiment were deer and boar bones collected from the Awazu submarine archeological site, Shiga, Japan. The bone samples were decalcificated with 4℃, 0.8N HCl and the acid-insoluble residue was concentrated by centrifugation and lyophilized. The demineralized bone powder was hydrolysed with 6N HCl at 110℃. Solids were removed by centrifugation before the filtered hydrolysate was passed through the XAD-2 resin to remove fulvic and humic acids. For comparison of ability to remove organic contamination from fossil bone, the gelatin-extraction method of decalcification is a cellulose tube with 1.2HCl, followed by heating at 90℃ in water was also examined upon same samples. The XAD-purified hydrolysates have more positive δ ^<13>C values and older ^<14>C ages than gelatin collagen extracted in hot water. The difference tends to become greater for poorly-preserved fossil bones, containing less than 1% extractable collagens. The fulvic and humic phases give apparent younger ages and significantly more negative δ ^<13>C values than bone organic carbon. The result indicates that the gelatin-extraction method is sufficient for ^<14>C dating on well-preserved bones, but insufficient on poorly-preserved bones, because hot-water extraction does not totally remove exogenous organic carbon. Then, XAD-2 resin is recommended for accurate ^<14>C and carbon isotope measurements., 第10回名古屋大学タンデトロン加速器質量分析計シンポジウム(平成9 (1997)年度)報告 ｢最新型タンデトロン加速器質量分析計(加速器年代測定システム)による高精度･高分解能14C年代測定の利用分野･方法の開拓(II)｣},
 pages = {46--54},
 title = {化石骨のアミノ酸抽出とその^<14>C年代},
 volume = {9},
 year = {1998}
}