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

Bibliographic Data

ID9246180
AuthorsP Ding, C D Shen, W X Yi, N Wang (0000-0002-2955-7588), X F Ding
Year2017
Volume59
Issue3
Pages705-711
Publication date2017-06-01
Open AccessYes
TypeARTICLE
VenueRadiocarbon (JOURNAL)
Journal identifiersISSN: 0033-8222 • E-ISSN: 1945-5755
PublisherCambridge University Press (CUP) (PUBLISHER)
DOI10.1017/rdc.2017.38
OpenAlexW2612421135
LanguageEN
References cited7

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 ( 14 C) measurements at the AMS- 14 C Preparation Lab in Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS). The volume of the sealed reactor tube is reduced to ~0.75 cm 3 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 12 C +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

Accelerator mass spectrometry · Carbon fibers · Chromatography · Graphite · Isotope-ratio mass spectrometry · Mass spectrometry · Metallurgy · Radiocarbon dating · Radiochemistry · Archaeology and ancient environmental studies · Chemistry · Isotope Analysis in Ecology · Materials Science · Pacific and Southeast Asian Studies · Environmental Chemistry · Geology

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