Publikationen

Treatment of small samples of particulate organic carbon (POC) for radiocarbon dating of ice

Autor(en)
Roswitha Drosg, Walter Kutschera, Kathrin Scholz, Peter Steier, Dietmar Wagenbach, Eva Maria Wild
Abstrakt

A filtration method for radiocarbon determination on particulate organic carbon (POC) in glacier ice is explored at VERA (Vienna Environmental Research Accelerator). Previous work on true samples has shown that laboratory contamination is the limiting factor. By systematic investigations on the origin of carbon contamination, we were able to reduce the background significantly. In two first measurements using artificially produced clean ice a blank level as low as 1.3 mu gC/kg ice could be achieved. These results were obtained by a simplified combustion scheme using valve-sealed vials. The combustion yield for organic materials was found to be 80% with a very low background typically below 1 mu gC. Outliers turned out to be the main obstacle when dealing with such minute carbon amounts.

Organisation(en)
Isotopenphysik
Externe Organisation(en)
Ruprecht-Karls-Universität Heidelberg
Journal
Nuclear Instruments & Methods in Physics Research. Section B. Beam Interactions with Materials and Atoms
Band
259
Seiten
340-344
Anzahl der Seiten
5
ISSN
0168-583X
DOI
https://doi.org/10.1016/j.nimb.2007.02.094
Publikationsdatum
2007
Peer-reviewed
Ja
ÖFOS 2012
105204 Klimatologie, 103005 Atomphysik
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/treatment-of-small-samples-of-particulate-organic-carbon-poc-for-radiocarbon-dating-of-ice(ac909a88-4f1e-4681-b6dd-fa911123f930).html