A New Method and Mass-Spectrometric Instrument for Extraterrestrial Microbial Life Detection Using the Elemental...

Area of Science:

• Astrobiology
• Planetary Science
• Analytical Chemistry

Background:

• Detecting extraterrestrial life is a key goal in astrobiology.
• Elemental composition analysis offers a novel approach to identifying microbial biosignatures.
• Previous methods lacked the specificity to differentiate biological from geological samples.

Purpose of the Study:

• To introduce a new technique for detecting extraterrestrial microorganisms using elemental composition.
• To describe the design and capabilities of the ABIMAS instrument for biomass detection.
• To validate the use of specific elemental ratios and abundances as biomarkers for life detection.

Main Methods:

• Utilized time-of-flight laser mass-reflectron (TOF LMR) and sample preparation unit (SPU) for biomass extraction and analysis.
• Analyzed elemental composition, focusing on P/S and Ca/K ratios, and C and N abundances.
• Tested the technique on microbial cultures and polar permafrost samples as Martian analogues.

Main Results:

• Confirmed the ability to identify biomass through specific elemental biomarkers.
• Demonstrated that a combination of biomarkers is crucial for discriminating microbial from geological samples.
• Successfully tested the technique on terrestrial analogues for extraterrestrial environments.

Conclusions:

• The developed technique and ABIMAS instrument are capable of detecting and identifying extraterrestrial microorganisms.
• This method holds significant potential for future missions to Mars, Europa, Ganymede, and Enceladus.
• Elemental analysis provides a robust method for life detection in diverse extraterrestrial samples.