| Title: | Thermal stability of adsorbents used for gas chromatography in space exploration |
| Author(s): | Bouchra L; Szopa C; Buch A; Coscia D; |
| Address: | "Laboratoire Atmosphere, Milieux, Observations Spatiales (LATMOS), LATMOS/IPSL, UVSQ Universite Paris-Saclay, Sorbonne Universite, CNRS, CNES, 11 Bd d'Alembert, 78280 Guyancourt, France. Laboratoire Atmosphere, Milieux, Observations Spatiales (LATMOS), LATMOS/IPSL, UVSQ Universite Paris-Saclay, Sorbonne Universite, CNRS, CNES, 11 Bd d'Alembert, 78280 Guyancourt, France; Institut Universitaire de France, Paris, France. Electronic address: cyril.szopa@latmos.ipsl.fr. Laboratoire Genie des Procedes et Materiaux, CentraleSupelec, Gif-sur-Yvette, France" |
| DOI: | 10.1016/j.chroma.2021.462087 |
| ISSN/ISBN: | 1873-3778 (Electronic) 0021-9673 (Linking) |
| Abstract: | "For analytical purpose, thermal desorption is now used in gas chromatographs developed to analyse the chemical composition of planetary environments. Due to technical constraints, the thermal desorption cannot be as finely controlled as in the laboratory resulting in possible thermal alteration of the adsorbents used. For these reasons, the influence of heat on physical and chemical properties of various adsorbents, either used or that could be used in gas chromatographs for space exploration, is studied. If the adsorbents made of carbon molecular sieves and graphitised carbon black that were tested show a very high thermal stability up to 800 degrees C, the porous polymers tested are highly degraded from a minimum temperature that depends on the nature of the polymer. Poly-2,6-diphenylphenylene oxide is shown to be the more thermally robust as it is degraded at higher temperatures, confirming it is currently the best choice for analysing organic molecules with a space instrument. Finally, the products of degradation of the porous polymers tested were analysed after heating the porous polymers at 400 degrees C and 800 degrees C. They were identified and listed as potential contaminants of analyses performed with this type of adsorbent. If the exposure to the higher temperature produces numerous organic compounds, mainly aromatic ones, a few ones are also detected at the lower temperature tested, meaning they should be considered as potential contaminants. Again poly-2,6-diphenylphenylene oxide should be preferred because it releases less organic compounds, the structure of which is completely specific to the adsorbent composition" |
| Keywords: | "Adsorption Chromatography, Gas/*methods Gases/analysis Polymers/chemistry Pyrolysis *Space Flight *Temperature Thermogravimetry Time Factors Volatilization Adsorbents Gas chromatography Space exploration Thermal desorption Thermal stability;" |
| Notes: | "MedlineBouchra, L Szopa, C Buch, A Coscia, D eng Netherlands 2021/04/06 J Chromatogr A. 2021 May 10; 1644:462087. doi: 10.1016/j.chroma.2021.462087. Epub 2021 Mar 22" |
