Studies on the Preparation of Small 14 C Samples with an RGA and 13 C-Enriched Material
Bibliographic Data
| ID | 9245034 |
|---|---|
| Authors | Jakob Liebl, Roswitha Avalos Ortiz, Robin Golser (0000-0002-4934-6278), Florian Handle, Walter Kutschera (0000-0002-3098-3760), Peter Steier (0000-0002-6144-2449), Eva Maria Wild (0000-0002-9882-8919) |
| Year | 2010 |
| Volume | 52 |
| Issue | 3 |
| Pages | 1394-1404 |
| Publication date | 2010-01-01 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Radiocarbon (JOURNAL) |
| Journal identifiers | ISSN: 0033-8222 • E-ISSN: 1945-5755 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.1017/s0033822200046476 |
| OpenAlex | W2238826423 |
| Language | EN |
| Citations received | 7 |
| References cited | 13 |
The minimum size of radiocarbon samples for which reliable results can be obtained in an accelerator mass spectrometry (AMS) measurement is in many cases limited by carbon contamination introduced during sample preparation (i.e. all physical and chemical steps to which samples were subjected, starting from sampling). Efforts to reduce the sample size limit down to a few μg carbon require comprehensive systematic investigations to assess the amount of contamination and the process yields. We are introducing additional methods to speed up this process and to obtain more reliable results. A residual gas analyzer (RGA) is used to study combustion and graphitization reactions. We could optimize the reaction process at small CO 2 pressures and identify detrimental side reactions. Knowing the composition of the residual gas in a graphitization process allows a reliable judgment on the completeness of the reaction. Further, we use isotopically enriched 13 C (≥98% 13 C) as a test material to determine contamination levels. This offers significant advantages: 1) The measurement of 12 C/ 13 C in CO 2 is possible on-line with the RGA, which significantly reduces turnaround times compared to AMS measurements; 2) Both the reaction yield and the amount of contamination can be determined from a single test sample. The first applications of isotopically enriched 13 C and the RGA have revealed that our prototype setup has room for improvements via better hardware; however, significant improvements of our sample processing procedures were achieved, eventually arriving at an overall contamination level of 0.12 to 0.15 μg C during sample preparation (i.e. freeze-drying, combustion, and graphitization) of μg-sized samples in aqueous solution, with above 50% yield
Accelerator mass spectrometry · Carbon fibers · Chromatography · Combustion · Contamination · Detection limit · Mass spectrometry · Metallurgy · Radiochemistry · Residual · Residual gas analyzer · Sample Preparation · Spectrum analyzer · Turnaround time · Archaeology and ancient environmental studies · Chemistry · Computer Science · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Materials Science · Environmental Chemistry
AMS dating of ancient plant residues from experimental stone tools
On the effect of organic carbon on rehydroxylation (RHX) dating
Conventionally Heated Microfurnace for the Graphitization of Microgram-Sized Carbon Samples
Ultra-Small Graphitization Reactors for Ultra-Microscale 14 C Analysis at the National Ocean Sciences Accelerator Mass Spectrometry (Nosams) Facility
A New UV Oxidation Setup for Small Radiocarbon Samples in Solution
Preparation Methods of μg Carbon Samples for 14 C MeasuremenTS
Bag of Tricks
Ultra small-mass AMS 14C sample preparation and analyses at KCCAMS/UCI Facility
A Gas Ion Source for Radiocarbon Measurements at 200 kV
AMS-Graphite Target Production Methods at the Woods Hole Oceanographic Institution During 1986–1991
Radiocarbon Determination of Particulate Organic Carbon in Non-Temperated, Alpine Glacier Ice
| Citations per year | 0.54 |
|---|---|
| Citation span | 2013 - 2017 (5) |
| Highly cited | No |