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dc.contributor.authorFreeman, Een
dc.contributor.authorSkinner, Lukeen
dc.contributor.authorReimer, Ren
dc.contributor.authorScrivner, Aen
dc.contributor.authorFallon, Sen
dc.date.accessioned2016-04-28T14:37:30Z
dc.date.available2016-04-28T14:37:30Z
dc.date.issued2016-01-05en
dc.identifier.citationE Freeman, L C Skinner, R Reimer, A Scrivner and S Fallon (2016). Graphitization of Small Carbonate Samples for Paleoceanographic Research at the Godwin Radiocarbon Laboratory, University of Cambridge. Radiocarbon, 58, pp 89-97 doi:10.1017/RDC.2015.8en
dc.identifier.issn0033-8222
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/255793
dc.description.abstractA 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.
dc.description.sponsorshipWe would like to thank James Rolfe for running the stable isotope measurements, as well as the Royal Society and NERC grant NE/L006421/1 for research support.
dc.languageEnglishen
dc.language.isoenen
dc.publisherCambridge University Press
dc.subjectradiocarbon analysisen
dc.subjecttarget preparationen
dc.subjectgraphitizationen
dc.subjectgeochemistryen
dc.subjectgeophysicsen
dc.subjectAMS datingen
dc.subjectcarbonate samplesen
dc.subjectpaleooceanographyen
dc.subjectfractionationen
dc.subjectreductionen
dc.subjectgraphiteen
dc.subjectfractionationen
dc.titleGraphitization of Small Carbonate Samples for Paleoceanographic Research at the Godwin Radiocarbon Laboratory, University of Cambridgeen
dc.typeArticle
dc.provenanceOA-4994
dc.description.versionThis is the author accepted manuscript. The final version is available from Cambridge University Press via http://dx.doi.org/10.1017/RDC.2015.8en
prism.endingPage97
prism.publicationDate2016en
prism.publicationNameRadiocarbonen
prism.startingPage89
prism.volume58en
dc.rioxxterms.funderNERC
dc.rioxxterms.projectidNE/L006421/1
rioxxterms.versionofrecord10.1017/RDC.2015.8en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2016-01-05en
dc.contributor.orcidSkinner, Luke [0000-0002-5050-0244]
dc.identifier.eissn1945-5755
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idNERC (NE/L006421/1)


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