From Background to Signal: Challenges of a Solid Sample Analysis Using SAM GC-MS

Abstract : A mongst the Sample Analysis at Mars (SAM) experiment capabilities, the GCMS mode (coupling of the Gas - Chromatograph and the q uadrupole Mass - Spectrometer instruments) was designed for the separation and ident ification of the chemical components of the gases evolved from a solid sample, either processed by heat in pyrolysis or by chemical react ant in wet chemistry [1] . Prior to the three portioned samples already analyzed in pyrolysis GCMS, an internal SAM blan k run was carried out with an empty quartz cup. This blank analysis was required to understand the background signal intrinsic to the GCMS response of the SAM experiment. With this aim, it was run using analytical conditions similar to those used for the R ocknest samples. The identification of the compounds present in the background and the understanding of their origin are necessary to perform quantitative analysis and to aid the interpretation of the solid sample results.
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Caroline Freissinet, A. Buch, Daniel Glavin, Michel Cabane, Patrice Coll, et al.. From Background to Signal: Challenges of a Solid Sample Analysis Using SAM GC-MS. 44th LPSC Lunar and Planetary Science Conference, Mar 2013, Houston, United States. ⟨hal-01815502⟩

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