Publication Date:
2022-05-25
Description:
Author Posting. © Arizona Board of Regents on behalf of the University of Arizona, 2010. This article is posted here by permission of Dept. of Geosciences, University of Arizona for personal use, not for redistribution. The definitive version was published in Radiocarbon 52 (2010): 295-300.
Description:
Gas-accepting ion sources for radiocarbon accelerator mass spectrometry (AMS) have permitted the direct
analysis of CO2 gas, eliminating the need to graphitize samples. As a result, a variety of analytical instruments can be interfaced
to an AMS system, processing time is decreased, and smaller samples can be analyzed (albeit with lower precision). We
have coupled a gas chromatograph to a compact 14C AMS system fitted with a microwave ion source for real-time compoundspecific
14C analysis. As an initial test of the system, we have analyzed a sample of fatty acid methyl esters and biodiesel. Peak
shape and memory was better then existing systems fitted with a hybrid ion source while precision was comparable. 14C/12C
ratios of individual components at natural abundance levels were consistent with those determined by conventional methods.
Continuing refinements to the ion source are expected to improve the performance and scope of the instrument.
Description:
This work was performed under NSF Cooperative Agreement Number OCE-0753487.
Repository Name:
Woods Hole Open Access Server
Type:
Article
Format:
application/pdf
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