Deriving AMS Radiocarbon Age of Fossil Bone by Pretreatment with XAD-2 Resin: Comparison with the Gelatin Extraction Method

摘要

Accurate radiocarbon (~14C) and carbon iso- tope measurements of fossil bones require com- plete removal of all exogenous carbon. XAD-2 chromatography was used to eliminate the for- eign organic matter from bones. The fossil bones used in the experiment were animal bone fragments collected at the Awazu subma- rine archeological site. The bone samples were demineralized with 0.8M HCl at 4℃, and the acid-insoluble residue was concentrated by centrifugation and lyophilized.