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- W2950381444 abstract "ABSTRACT Radiocarbon ( 14 C) analysis of carbon dioxide (CO 2 ) provides unique information on the age, turnover and source of this important greenhouse gas, raising the prospect of novel scientific investigations into a range of natural and anthropogenic processes. To achieve these measurements, cartridges containing zeolite molecular sieves are a reliable and convenient method for collecting CO 2 samples. At the NERC Radiocarbon Facility (East Kilbride) we have been refining our molecular sieve methods for over twenty years to achieve high-quality, reproducible and precise measurements. At the same time, we have been developing novel field sampling methods to expand the possibilities in collecting gas from the atmosphere, soil respiration and aquatic environments. Here, we present our latest improvements to cartridge design and procedures. We provide the results of tests used to verify the methods using known 14 C content standards, demonstrating reliability for sample volumes of 3 mL CO 2 (STP; 1.6 mg C) collected in cartridges that had been prepared at least three months earlier. We also report the results of quality assurance standards processed over the last two years, with results for 22 out of 23 international 14 C standards being within measurement uncertainty of consensus values. We describe our latest automated procedures for the preparation of cartridges prior to use." @default.
- W2950381444 created "2019-06-27" @default.
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- W2950381444 date "2019-08-15" @default.
- W2950381444 modified "2023-10-18" @default.
- W2950381444 title "Advances in the Radiocarbon Analysis of Carbon dioxide at the NERC Radiocarbon Facility (East Kilbride) using Molecular sieve Cartridges" @default.
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- W2950381444 doi "https://doi.org/10.1017/rdc.2019.86" @default.
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