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Poster Presentations
Day 4, June 25（Wed.）
Room P (Maesato East, Foyer, Ocean Wing)
- 4P-AM-37
Development of an Automated System for the Pretreatment of Small Amounts of Samples for Radiocarbon Measurements Using Accelerator Mass Spectrometry
(Univ. Tokyo)
oYosuke Miyairi, Takahiro Aze, Yusuke Yokoyama
For radiocarbon analysis using accelerator mass spectrometry, the sample must be graphitized prior to analysis. Generally, a sample of around 1mg carbon is required for AMS measurement, though in recent years, the amount of sample required for AMS measurement has been decreasing due to innovations in AMS technology, and there are now cases where samples of around 10μg carbon have been measured, e.g., Yokoyama et al. 2022. This sample size is similar to that required for stable isotope mass spectrometry of carbon. This implies the possibility that the various pretreatment devices (e.g., elemental analysers) used in stable isotope mass analysis may also be used in AMS radiocarbon analysis. For a comprehensive sample preparation system, an automated graphitization system is required to produce graphite in conjunction with these pretreatment devices. We have constructed a system that separates and purifies CO2 gas from He gas, which is the carrier gas, by receiving electronic signals transmitted by the EA, etc. and have evaluated the performance of this automated system using IAEA standards. In this presentation, we will discuss the performance of this system and the possibility of linking it with AMS pretreatment devices such as EA and carbonate treatment devices. It is expected that the pretreatment work for AMS analysis will become less manually intensive with the use of this system.