Graphitization of Small Carbonate Samples for Paleoceanographic Research at the Godwin Radiocarbon Laboratory, University of Cambridge
Graphitization of Small Carbonate Samples for Paleoceanographic Research at the Godwin Radiocarbon Laboratory, University of Cambridge
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剑桥大学戈德温放射性碳实验室用于古海洋学研究的小碳酸盐样品的石墨化
DOI：
10.1017/rdc.2015.8
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发表时间：
2016
期刊：
影响因子：
8.3
通讯作者：
Freeman E
中科院分区：
文献类型：
--
作者：
Freeman E
2010年，剑桥大学古气候研究戈德温实验室建立了一个新的放射性碳制备设施。样品通过铁粉催化剂上的氢还原进行石墨化，然后送往贝尔法斯特的Chrono中心或澳大利亚国立大学进行加速器质谱（AMS）分析。实验装置和程序最近已经开发，以调查潜在的小样本有孔虫碳酸盐。通过分析样品的背景值从0.04到0.6毫克C沿着与类似大小的二级标准，设置和实验程序进行了优化，为小样品。“背景”现代14 C污染已通过仔细选择铁粉最小化，石墨化已通过使用“小体积”反应器进行优化，允许样品含有低至0.08毫克C石墨化和准确定年。石墨化效率/分馏被发现是不是小于0.07毫克C，而主要取决于AMS离子束光学分析的样品的主要限制，这表明在小样品分析的进一步改进可能还没有实现与我们的方法。
A new radiocarbon preparation facility was set up in 2010 at the Godwin Laboratory for Palaeoclimate Research, at the University of Cambridge. Samples are graphitized via hydrogen reduction on an iron powder catalyst before being sent to the Chrono Centre, Belfast, or the Australian National University for accelerator mass spectrometry (AMS) analysis. The experimental setup and procedure have recently been developed to investigate the potential for running small samples of foraminiferal carbonate. By analyzing background values of samples ranging from 0.04 to 0.6 mg C along with similar sized secondary standards, the setup and experimental procedures were optimized for small samples. “Background” modern 14C contamination has been minimized through careful selection of iron powder, and graphitization has been optimized through the use of “small volume” reactors, allowing samples containing as little as 0.08 mg C to be graphitized and accurately dated. Graphitization efficiency/fractionation is found not to be the main limitation on the analysis of samples smaller than 0.07 mg C, which rather depends primarily on AMS ion beam optics, suggesting further improvements in small sample analysis might yet be achieved with our methodology.
第二十届国际放射性碳会议石墨化研讨会报告
影响因子：
8.3
作者：
J. Turnbull;C. Prior
通讯作者：
C. Prior
ATOMKI 新型石墨靶材生产设施的性能测试
影响因子：
8.3
作者：
L. Rinyu;I. Futó;Á. Kiss;M. Molnár;É. Svingor;G. Quarta;L. Calcagnile
通讯作者：
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影响因子：
8.3
作者：
E. Delqué;I. Caffy;C. Comby;J. Dumoulin;S. Hain;M. Massault;C. Moreau;A. Quiles;V. Setti;C. Souprayen;J. Tannau;B. Thellier;J. Vincent
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