A5001171955- Isotope Analysis in Ecology
- Planetary Science and Exploration
- Mass Spectrometry Techniques and Applications
- Astro and Planetary Science
- Electrochemical Analysis and Applications
- Advanced Chemical Sensor Technologies
- NMR spectroscopy and applications
- Cephalopods and Marine Biology
- Chemical Analysis and Environmental Impact
- Space Exploration and Technology
- Ion-surface interactions and analysis
- Atomic and Subatomic Physics Research
- Geochemistry and Geologic Mapping
- CO2 Sequestration and Geologic Interactions
- Origins and Evolution of Life
- Hydraulic Fracturing and Reservoir Analysis
- Atmospheric Ozone and Climate
- Groundwater flow and contamination studies
- Electrohydrodynamics and Fluid Dynamics
- Analytical Chemistry and Sensors
Jet Propulsion Laboratory
2019-2024
California Institute of Technology
2021
Tufts University
2019
Abstract The observed fall and rapid recovery of the Tissint Mars meteorite has provided minimally contaminated samples Martian surface. We report analyses for organic compounds by pyrolysis‐gas chromatography‐mass spectrometry soluble salts ion chromatography. Pyrolysis‐gas analysis shows presence similar to those in EETA79001 Nakhla meteorites. profile is dominated aromatic hydrocarbons, including oxygen nitrogen‐containing aromatics, sulfur‐containing species thiophenes. are sulfate...
The detection of chlorinated hydrocarbons by Curiosity on Mars has been attributed to the presence unidentified indigenous organic matter. Similarly, oxychlorines Earth have proposed be responsible for apparent lack organics in Atacama Desert. perchlorate (ClO4-) poses a unique challenge measurement matter due oxidizing power during commonly used pyrolysis-gas chromatography-mass spectrometry (py-GC-MS) methods. Here, we show that perchlorates and other oxyanion salts inhibit compounds but...
The Europan Molecular Indicators of Life Investigation (EMILI) is an instrument concept being developed for the Europa Lander mission currently under study. EMILI will meet and exceed scientific technical/resource requirements organic composition analyzer identified as a core on Lander. tightly couples two complementary analytical techniques, based 1 ) liquid extraction processing with capillary electrophoresis 2 thermal chemical gas chromatography, to robustly detect, structurally...
In situ missions of exploration require analytical methods that are capable detecting a wide range molecular targets in complex matrices without priori assumptions sample composition. Furthermore, these should minimize the number reagents needed and any preparation steps. We have developed method for detection metabolically relevant inorganic organic anions is suitable implementation on spaceflight missions. Using 55 mM acetic acid, 50 triethylamine, 5% glycerol, more than 21 separated less...
Abstract Using a standardized miniature format ion selective electrode, five different carbon based solid contact materials, including novel commercially available graphene oxide assisted nanotube dispersion (Flexiphene TM ), were compared. The electromotive force (EMF) response, stability, and behavior following storage was evaluated. Bulk resistance for the oxide/carbon (GO‐CNT) ISE observed to be 0.09±0.03 MΩ, which is two orders of magnitude lower than reported either component in...
A primary goal of future astrobiology missions is the search for chemical signs life beyond Earth. Biosignatures indicative biology can take form complex organic molecules or distributions smaller such as amino acids. To acquire evidence this second class biosignatures, separation science essential. Moreover, when examining polar compounds, liquid-based analysis becomes imperative. Capillary electrophoresis a powerful technique ideally suited and flight implementation. This requires use...
The search for life in our Solar System is one of the highest priorities at NASA. Because presence liquid water Oceans Worlds such as Jupiter's moon Europa, and Saturn's Enceladus, these bodies could potentially harbor be focus future missions. Liquid-based analytical techniques are particularly attractive situ analyses on locations, since sample analyzed its natural state (e.g., or melted ice). Capillary electrophoresis (CE) a powerful separation technique that has tremendous promise...
The measurement of the soluble properties (pH, eH, conductivity, specific ion concentrations, etc.) planetary science samples provides important information on habitability a location, bulk components sample, potential for undesired effects analysis protocols, and history/preservation sample (e.g., geologic weathering, radiation processing, etc.). Electrochemical sensors are an ideal means to measure because they excel at detecting ionic species in solution. Wet Chemistry Lab (WCL) 2007 Mars...