Methods for High-Precision 14 C AMS Measurement of Atmospheric CO 2 at LLNL
Bibliographic Data
| ID | 9244645 |
|---|---|
| Authors | Heather D Graven, Thomas P Guilderson (0000-0001-9371-7059), Ralph F Keeling (0000-0002-9749-2253) |
| Year | 2007 |
| Volume | 49 |
| Issue | 2 |
| Pages | 349-356 |
| Publication date | 2007-01-01 |
| Peer Reviewed | Yes |
| 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/s0033822200042284 |
| OpenAlex | W2168819101 |
| Language | EN |
| Citations received | 10 |
| References cited | 17 |
Development of radiocarbon analysis with precision better than 2% has the potential to expand the utility of 14 CO 2 measurements for carbon cycle investigations as atmospheric gradients currently approach the typical measurement precision of 2–5%. The accelerator mass spectrometer at Lawrence Livermore National Laboratory (LLNL) produces high and stable beam currents that enable efficient acquisition times for large numbers of 14 C counts. One million 14 C atoms can be detected in approximately 25 min, suggesting that near 1% counting precision is economically feasible at LLNL. The overall uncertainty in measured values is ultimately determined by the variation between measured ratios in several sputtering periods of the same sample and by the reproducibility of replicate samples. Experiments on the collection of 1 million counts on replicate samples of CO 2 extracted from a whole air cylinder show a standard deviation of 1.7% in 36 samples measured over several wheels. This precision may be limited by the reproducibility of oxalic acid I standard samples, which is considerably poorer. We outline the procedures for high-precision sample handling and analysis that have enabled reproducibility in the cylinder extraction samples at the
Accelerator mass spectrometry · Accuracy and precision · Chromatography · Mass spectrometry · National laboratory · Optics · Physics · Replicate · Reproducibility · Spectrometer · Standard deviation · Statistics · Atmospheric and Environmental Gas Dynamics · Atmospheric Ozone and Climate · Chemistry · Environmental Science · Isotope Analysis in Ecology · Mathematics
Comparison of Independent Δ14CO2 records at Point Barrow, Alaska
High-Precision Atmospheric 14 CO 2 Measurement at the Rafter Radiocarbon Laboratory
Micadas
Developing Ultra Small-Scale Radiocarbon Sample Measurement at the University of Tokyo
Allocation of Terrestrial Carbon Sources Using 14 CO 2
Novel Method of Extraction for Radiocarbon Measurements of Atmospheric Carbon dioxide
Atmospheric Radiocarbon Workshop Report
Comparison of Independent Δ 14 CO 2 Records at Point Barrow, Alaska
A New Automated Extraction System for 14 C Measurement for Atmospheric Co 2
Initial Results of an Intercomparison of AMS-Based Atmospheric 14 CO 2 Measurements
Towards High-Precision AMS
Radiocarbon – A Unique Tracer of Global Carbon Cycle Dynamics
Years of Tropospheric 14 C Observations in Central Europe
Magnesium Perchlorate as an Alternative Water Trap in AMS Graphite Sample Preparation
Seawater Radiocarbon Evolution in the Gulf of Alaska
The Use of Radiocarbon Measurements in Atmospheric Studies
The Tropospheric 14 CO 2 Level in Mid-Latitudes of the Northern Hemisphere (1959–2003)
High-Accuracy 14 C Measurements for Atmospheric CO 2 Samples by AMS
Discussion Reporting of 14 C Data
| Unique citing works | 10 |
|---|---|
| Citations per year | 0.63 |
| Citation span | 2010 - 2019 (10) |
| Citation velocity | historical |
| Highly cited | No |
| Citation types | Neutral: 10 |