5:15 PM - 6:45 PM
[MZZ45-P09] Making of a phosphate decomposition vessel for trace carbon 14 analysis of AMS and example of a stepwise melting experiment of small size otolith using the vessel.
Keywords:Radiocarbon, AMS, otolith
Analysis of radiocarbon (C-14) using accelerator mass spectrometry (AMS) requires about 1 mg of carbon. sample is required. Development of analytical methods using trace samples has been actively pursued (e.g., Yamane et al., 2019), and the AMS system owned by the Atmosphere and Ocean Research Institute,The University of Tokyo to which the authors belong, is currently capable of analyzing up to about 20 micro g of sample. The development of analytical methods using trace samples has been mainly focused on the processing of organic samples, since the development of radiocarbon dating methods for compound specific radiocarbon analysis (CSRA) the impetus for the development of these methods. However, there are many needs for trace sample analysis using carbonate samples, such as the dating of trace foraminiferal samples and seasonal analysis studies of coral annual rings, Analytical methods for carbonate-treated samples also needed to be established.
At the Atmosphere and Ocean Research Institute, uses a system based on Yokoyama et.al. (2007) for the analysis of normal-volume (1 mg carbon) samples. (2007). This system is suitable for rapid processing of 1 mgC samples, but for the analysis of trace amounts of carbon, it was necessary to manufacture equipment with good conductance, easy gas transfer, and easy cleaning of the system. In this study, a special container integrated with a needle valve for trace amounts of carbon was fabricated.
In this presentation, we will introduce an experimental method for the stepwise melting of otoliths using this container as an example of research on trace sample analysis using carbonate samples.
At the Atmosphere and Ocean Research Institute, uses a system based on Yokoyama et.al. (2007) for the analysis of normal-volume (1 mg carbon) samples. (2007). This system is suitable for rapid processing of 1 mgC samples, but for the analysis of trace amounts of carbon, it was necessary to manufacture equipment with good conductance, easy gas transfer, and easy cleaning of the system. In this study, a special container integrated with a needle valve for trace amounts of carbon was fabricated.
In this presentation, we will introduce an experimental method for the stepwise melting of otoliths using this container as an example of research on trace sample analysis using carbonate samples.