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Quantitative Analysis by Thermogravimetry-Mass Spectrum Analysis for Reactions with Evolved Gases

Quantitative Analysis by Thermogravimetry-Mass Spectrum Analysis for Reactions with Evolved Gases

Published on: October 29, 2018

Phoenix Mars Mission--the thermal evolved gas analyzer.

John H Hoffman¹, Roy C Chaney, Hilton Hammack

¹University of Texas at Dallas, Richardson, Texas 75080, USA. jhoffman@utdallas.edu

Journal of the American Society for Mass Spectrometry

|August 22, 2008

Summary

The Phoenix spacecraft analyzed Martian soil for water history and organic molecules. Its instruments, including the thermal evolved gas analyzer (TEGA), studied subsurface ice and atmospheric gases.

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Area of Science:

Planetary Science
Astrobiology
Geochemistry

Background:

The Phoenix mission aimed to investigate the Martian northern arctic region.
Understanding Mars's water history and potential for life is a key scientific goal.

Purpose of the Study:

To study the history of water on Mars.
To search for organic molecules in the icy subsurface Martian soil.
To analyze the composition and isotopic ratios of Martian atmospheric gases.

Main Methods:

Utilized the Phoenix lander equipped with an arm and scoop to access subsurface ice.
Employed the thermal evolved gas analyzer (TEGA) with eight ovens to heat soil samples.
Used a miniature magnetic sector mass spectrometer for gas analysis and isotopic ratio measurements.

Main Results:

Successfully landed and collected samples from the Martian northern arctic region.
The thermal evolved gas analyzer (TEGA) released gases and decomposition products from soil samples.
The mass spectrometer provided data on atmospheric composition and isotopic ratios, including noble gases.

Conclusions:

The Phoenix mission provided valuable data on the Martian environment and its potential habitability.
Analysis of subsurface ice and atmospheric gases contributes to understanding Mars's past and present conditions.
The use of advanced instruments like the mass spectrometer with a gas enrichment cell improved measurement accuracy.