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Small-mass graphite preparation for AMS 14C measurements performed at GIGCAS, China

  • P Ding (a1), C D Shen (a1) (a2), W X Yi (a1), N Wang (a1) and X F Ding (a2)...


The sealed tube Zn reduction method has been applied for small-mass samples ranging from 15 to 100 μg carbon preparation for accelerator mass spectrometry (AMS) radiocarbon (14C) measurements at the AMS-14C Preparation Lab in Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS). The volume of the sealed reactor tube is reduced to ~0.75 cm3 in order to increase the yield of graphite. Graphite targets are measured at the Keck Carbon Cycle AMS Facility at the University of California, Irvine (KCCAMS). The targets generate a maximum 12C+1 current of about 0.5 μA per 1 μg C. The modern-carbon background is estimated to be 0.25–0.60 μg C, and dead-carbon background to be ~0.3–0.9 μg C. Both modern-carbon background and dead-carbon background are size dependent, so the results can be corrected. The precision of the small-mass modern carbon standard samples is±15–25‰ for the size of ~15–20 μg C,±5–10‰ for ~20–50 μg C, and±3–10‰ for 50–100 μg C. Further reduction of dead-carbon and modern-carbon contamination is needed in preparation of small-mass samples at GIGCAS.


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Selected Papers from the 2015 Radiocarbon Conference, Dakar, Senegal, 16–20 November 2015



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Ding, P, Shen, CD, Yi, WX, Wang, N, Ding, XF, Liu, KX, Fu, DP, Liu, WG, Liu, Y. 2015. A high-resolution method for 14C analysis of a coral from South China Sea: implication for “AD 775” 14C event. Nuclear Instruments and Methods in Physics Research B 361:659664.
Khosh, MS, Xu, X, Trumbore, SE. 2010. Small-mass graphite preparation by sealed tube zinc reduction method for AMS 14C measurements. Nuclear Instruments and Methods in Physics Research B 268(7–8):927930.
Lang, SQ, McIntyre, CP, Bernasconi, SM, Früh-Green, GL, Voss, BM, Eglinton, TI, Wacker, L. 2016. Rapid 14C analysis of dissolved organic carbon in non-saline waters. Radiocarbon 58(3):505515.
Liu, JW, Li, J, Zhang, YL, Liu, D, Ding, P, Shen, CD, Shen, KJ, He, QF, Ding, X, Wang, XM, Chen, DH, Szidat, S, Zhang, G. 2014. Source apportionment using radiocarbon and organic tracers for PM2.5 carbonaceous aerosols in Guangzhou, South China: contrasting local- and regional-scale haze events. Environment Science & Technology 48(20):1200212011.
Liu, KX, Ding, XF, Fu, DP, Pan, Y, Wu, XH, Guo, ZY, Zhou, LP. 2007. A new compact AMS system at Peking University. Nuclear Instruments and Methods in Physics Research B 259:2326.
Santos, GM, Southon, JR, Griffin, S, Beaupre, SR, Druffel, ERM. 2007. Ultra small-mass AMS 14C sample preparation and analyses at KCCAMS/UCI Facility. Nuclear Instruments and Methods in Physics Research B 259(1):293302.
Xu, X, Trumbore, SE, Zheng, S, Southon, JR, McDuffee, KE, Luttgen, M, Liu, JC. 2007. Modifying a sealed tube zinc reduction method for preparation of AMS graphite targets: reducing background and attaining high precision. Nuclear Instruments and Methods in Physics Research B 259(1):320329.
Xu, X, Gao, P, Salamanca, EG. 2013. Ultra small-mass graphitization by sealed tube zinc reduction method for AMS 14C measurements. Radiocarbon 55(2–3):608616.



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