@article{Castrillejo:2023:10.1017/RDC.2023.16,
author = {Castrillejo, M and Hansman, RL and Graven, HD and Lester, JG and Bollhalder, S and Kundig, K and Wacker, L},
doi = {10.1017/RDC.2023.16},
journal = {Radiocarbon: an international journal of cosmogenic isotope research},
title = {Comparability of radiocarbon measurements in dissolved inorganic carbon of seawater produced at ETH-Zurich},
url = {http://dx.doi.org/10.1017/RDC.2023.16},
year = {2023}
}

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TY  - JOUR
AB  - Radiocarbon observations (Δ14C) in dissolved inorganic carbon (DIC) of seawater provide useful information about ocean carbon cycling and ocean circulation. To deliver high-quality observations, the Laboratory of Ion Beam Physics (LIP) at ETH-Zurich developed a new simplified method allowing the rapid analysis of radiocarbon in DIC of small seawater samples, which is continually assessed by following internal quality controls. However, a comparison with externally produced 14C measurements to better establish an equivalency between methods was still missing. Here, we make the first intercomparison with the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility based on 14 duplicate seawater samples collected in 2020. We also compare with prior deep-water observations from the 1970s to 1990s. The results show a very good agreement in both comparisons. The mean Δ14C of 12 duplicate samples measured by LIP and NOSAMS were statistically identical within one sigma uncertainty while two other duplicate samples agreed within two sigma. Based on this small number of duplicate samples, LIP values appear to be slightly lower than the NOSAMS values, but more measurements will be needed for confirmation. We also comment on storage and preservation techniques used in this study, including the freezing of samples collected in foil bags.
AU  - Castrillejo,M
AU  - Hansman,RL
AU  - Graven,HD
AU  - Lester,JG
AU  - Bollhalder,S
AU  - Kundig,K
AU  - Wacker,L
DO  - 10.1017/RDC.2023.16
PY  - 2023///
SN  - 0033-8222
TI  - Comparability of radiocarbon measurements in dissolved inorganic carbon of seawater produced at ETH-Zurich
T2  - Radiocarbon: an international journal of cosmogenic isotope research
UR  - http://dx.doi.org/10.1017/RDC.2023.16
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000948663400001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://www.cambridge.org/core/journals/radiocarbon/article/comparability-of-radiocarbon-measurements-in-dissolved-inorganic-carbon-of-seawater-produced-at-ethzurich/B9F6C6AA45835FA3ED0BF8E0CD9788E3
UR  - http://hdl.handle.net/10044/1/107787
ER  - 

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