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SAMPLE PREPARATION SYSTEM FOR CARBONATE AND DIC IN WATER AT THE GXNU-AMS LABORATORY

Published online by Cambridge University Press:  18 September 2024

Hongtao Shen Open the ORCID record for Hongtao Shen [Opens in a new window] ,
Linjie Qi ,
He Ouyang ,
Xinyi Han ,
Guofeng Zhang ,
Dingxiong Chen ,
Kaiyong Wu ,
Junsen Tang ,
Li Wang  and
Ning Wang
...Show all authors
Hongtao Shen*
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology, Guilin Guangxi 541004, China
Linjie Qi
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
He Ouyang
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
Xinyi Han
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
Guofeng Zhang
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
Dingxiong Chen
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
Kaiyong Wu
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
Junsen Tang
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology, Guilin Guangxi 541004, China
Li Wang
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
Ning Wang
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology, Guilin Guangxi 541004, China
Xiaojun Sun
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology, Guilin Guangxi 541004, China
Ming He
Affiliation:
China Institute of Atomic Energy, Beijing 102413, China
Kimikazu Sasa
Affiliation:
University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
Jiang Shan
Affiliation:
China Institute of Atomic Energy, Beijing 102413, China
*
*Corresponding author. Email: [email protected]
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Abstract

A new vacuum line to extract CO2 from carbonate and dissolved inorganic carbon (DIC) in water was established at Guangxi Normal University. The vacuum line consisted of two main components: a CO2 bubble circulation region and a CO2 purification collection region, both of which were made of quartz glass and metal pipelines. To validate its reliability, a series of carbonate samples were prepared using this system. The total recovery rate of CO2 extraction and graphitization exceeded 80%. Furthermore, the carbon content in calcium carbonate exhibited a linear relationship with the CO2 pressure within the system, demonstrating its stability and reliability. The system was also employed to prepare and analyze various samples, including calcium carbonate blanks, foraminiferal, shell, groundwater, and subsurface oil-water samples. The accelerator mass spectrometry (AMS) results indicated that the average beam current for 12C- in the samples exceeded 40 μA. Additionally, the contamination introduced during the liquid sample preparation process was approximately (1.77 ± 0.57) × 10−14. Overall, the graphitized preparation system for carbonate and DIC in water exhibited high efficiency and recovery, meeting the requirements for samples dating back to approximately 30,000 years.

Keywords

accelerator mass spectrometrycarbonatesample preparation
Type
Conference Paper
Information
Radiocarbon , Volume 66 , Issue 5: 24th Radiocarbon and 10th 14C & Archaeology, Zurich, Sept. 11–16, 2022 Proceedings Part 1 of 2 , October 2024 , pp. 1310 - 1321
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of University of Arizona

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Footnotes

Selected Papers from the 24th Radiocarbon and 10th Radiocarbon & Archaeology International Conferences, Zurich, Switzerland, 11–16 Sept. 2022.

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