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Pretreatment of Iron Artifacts at SNU-AMS

  • M K Cheoun (a1) (a2), J C Kim (a3), J Kang (a1), I C Kim (a3), J H Park (a3) and Y M Song (a1)...

Abstract

We present the current status of accelerator mass spectrometry (AMS) dating of iron artifacts at Seoul National University (SNU). In ancient iron production, charcoal was widely used as carbon for the smelting process, whereas coal is used in modern times. If reliable data could be obtained from carbon by using AMS, ancient iron artifacts could be traced to their production age. In normal acid treatment, it is not easy to extract carbon due to its colloidal property. The negative charge property of the carbon colloid, however, makes it possible for it to be precipitated with positive ions by dissolving the iron chemically. An extraction yield of the carbon incorporated in modern cast iron of about 70% is attained. More refined methods to increase the extraction rate are under progress for archaeological applications.

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References

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Beukens, RP, Pavlish, LA, Wilson, GC, Farquhar, RM. 1998. Authenticity of a Korean iron warrior on horseback. (Preprint; detailed references for old China steel making can be found here)
Cresswell, RG. 1992. Radiocarbon dating of iron artifacts. Radiocarbon 34(3):898905.
Hurukawa, R. 1997. Report of radiocarbon dating of old iron artifacts by AMS. Nagoya University. In Japanese.
Kim, JC, Lee, C, Park, JH, Kim, IC, Kang, J, Cheoun, MK, Kim, YD. 2000. A new AMS facility in Korea. Proceedings of the AMS 8 Conference. Nuclear Instruments and Physics Research B172:13–7.
Lee, C, Kim, JC, Park, JH, Kim, IC, Kang, J, Cheoun, MK, Choi, SY, Kim, YD, Moon, CB. 2000. Progress in sample preparation system for the Seoul National University AMS Facility. Proceedings of AMS 8 Conference. Nuclear Instruments and Physics Research B172: 454–7.
Nakamura, T. 1996. Annual Report of AMS of Nagoya University (VII). Nagoya University: Dating and Materials Research Center (in Japanese).
Nakamura, T, Hirasawa, M, Igaki, K. 1995. AMS radiocarbon dating of ancient oriental iron artifacts at Nagoya University. Radiocarbon 37(1):2734.
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Radiocarbon
  • ISSN: 0033-8222
  • EISSN: 1945-5755
  • URL: /core/journals/radiocarbon
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