A miniature laser-ablation time-of-flight mass spectrometer for sub-ppm analysis of planetary surfaces

Details A miniature laser-ablation time-of-flight mass spectrometer for sub-ppm analysis of planetary surfaces A miniature laser-ablation time-of-flight mass spectrometer for sub-ppm analysis of planetary surfaces

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1027w&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1027

Computer Science

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The performance of a laser ablation mass spectrometer (LMS) developed in our group for planetary research will be demonstrated. From the measurements of elemental and isotopic composition of the NIST reference samples the detection limit of ~100 ppb was determined. LMS can be considered quasi-quantitative for the measurements for most elements [2] using relative sensitivity coefficients (RSCs) for each species that have been established in prior calibrations. The quantitative detection of the lighter elements (e.g., C, P, S) is less accurate since the RSCs are larger. The isotopic fractionation effects are found to be negligible and the error in their determination is generally smaller than 1 %. In studies of minerals and meteoritic materials, the elemental composition of major, minor and trace elements can be obtained together with their isotopic pattern proving that this approach can be powerful in the investigation of the composition of airless surfaces of asteroids, planets, and their moons on in situ and sample return missions [4].

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