View in EDS

A quantitative evolved gas analysis for extra-terrestrial samples.

Saved in:
Bibliographic Details
Title: A quantitative evolved gas analysis for extra-terrestrial samples.
Authors: Verchovsky, A.B.1 (AUTHOR) sasha.verchovsky@open.ac.uk, Anand, M.1 (AUTHOR), Barber, S.J.1 (AUTHOR), Sheridan, S.1 (AUTHOR), Morgan, G.H.1 (AUTHOR)
Source: Planetary & Space Science. Feb2020, Vol. 181, pN.PAG-N.PAG. 1p.
Subjects: European Space Agency, Gas analysis, Lunar surface, Analytical chemistry, Mass spectrometry, Meteorites
Abstract: 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. CO 2 , CO, H 2 , O 2 , N 2 or their mixtures with known relative abundances) with known flow rate. The method was tested using simple chemical compounds such as CaCO 3 , 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. • The paper describes a quantitative evolve gas analysis with application to two meteorite samples. • The method is based on calibration of the quadrupole mass spectrometer sensitivity with respect to different gases. • The method was verified by analyses of pure chemical compounds decomposing into simple gases upon heating. [ABSTRACT FROM AUTHOR]
Copyright of Planetary & Space Science is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract: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. CO 2 , CO, H 2 , O 2 , N 2 or their mixtures with known relative abundances) with known flow rate. The method was tested using simple chemical compounds such as CaCO 3 , 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. • The paper describes a quantitative evolve gas analysis with application to two meteorite samples. • The method is based on calibration of the quadrupole mass spectrometer sensitivity with respect to different gases. • The method was verified by analyses of pure chemical compounds decomposing into simple gases upon heating. [ABSTRACT FROM AUTHOR]
ISSN:00320633
DOI:10.1016/j.pss.2019.104830