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A quantitative evolved gas analysis for extra-terrestrial samples

Verchovsky, A. B.; Anand, M.; Barber, S. J.; Sheridan, S. and Morgan, G. H. (2020). A quantitative evolved gas analysis for extra-terrestrial samples. Planetary and Space Science, 181, article no. 104830.

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Evolved gas analysis (EGA) has been successfully applied to the studies of meteorites and Apollo lunar samples. It consists of linear heating of a material with registration of the released volatile compounds, typically using a spectrometric technique. However, so far no quantitative comparison was possible of the amount of gases released during heating of a sample. To address this limitation, we have developed a Quantitative EGA (QEGA) technique using our custom-built Finesse mass spectrometry system. It is based on calibration of the quadrupole mass spectrometer with reference gases (e.g. CO2, CO, H2, O2, N2 or their mixtures with known relative abundances) with known flow rate. The method was tested using simple chemical compounds such as CaCO3, which give well-known amounts of pure gases during their thermal decomposition. We present initial QEGA data on two reference meteorites, Allende and Murchison. Our QEGA work is also informing the design and operation of ProSPA spaceflight instruments being developed to perform analogous experiments in situ on the lunar surface through the European Space Agency's PROSPECT payload on Luna 27.

Item Type: Journal Item
ISSN: 0032-0633
Project Funding Details:
Funded Project NameProject IDFunding Body
PROspecting lunar VolatilEsST/R001391/1UKSA UK Space Agency
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 68653
Depositing User: ORO Import
Date Deposited: 02 Jan 2020 09:26
Last Modified: 20 Feb 2020 05:36
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