Development of quantitative detection method for mass spectrometry coupled to an infrared laser spectroscope (Picarro) to monitor in nitrogen matrix a complex gas mixture of H 2 , He, CO, N 2 , Ne, O 2 , Ar, CO 2 , H 2 S, CH 4 , C 2 H 4 , C 2 H 6 , C 3 H 6 , C 3 H 8 , i-C 4 H 10 , n-C 4 H 10 , and C 5 H 12 .

Autor: Keita S; Géosciences, Ressources Naturelles et Environnement (GRNE), Sorbonne Université Faculté des Sciences et Ingénierie, Paris, France.; IFP Energies nouvelles, Rueil-Malmaison, France.; Andra, Laboratoire de Recherche Souterrain de Meuse/Haute-Marne, Bure, France., Noirez S; IFP Energies nouvelles, Rueil-Malmaison, France., Berthe G; IFP Energies nouvelles, Rueil-Malmaison, France., Vinsot A; Andra, Laboratoire de Recherche Souterrain de Meuse/Haute-Marne, Bure, France., Kim BS; IFP Energies nouvelles, Rueil-Malmaison, France., Mascle M; IFP Energies nouvelles, Rueil-Malmaison, France., Lundy M; Andra, Laboratoire de Recherche Souterrain de Meuse/Haute-Marne, Bure, France., Garcia B; IFP Energies nouvelles, Rueil-Malmaison, France.
Jazyk: angličtina
Zdroj: Rapid communications in mass spectrometry : RCM [Rapid Commun Mass Spectrom] 2023 Oct 15; Vol. 37 (19), pp. e9614.
DOI: 10.1002/rcm.9614
Abstrakt: Rationale: The deep geological repository is considered the international reference for radioactive waste management. All gas exchanges must be understood in the context of the feasibility of such a repository. The technological challenge is to continuously monitor a wide range of gaseous molecules at low concentrations in confined spaces.
Methods: A gas monitoring station, composed of two complementary analyzers, was developed: an electron impact quadrupole mass spectrometer (HPR-20 R&D Hiden Analytical) and an infrared laser spectroscope (Picarro). The spectrometer was calibrated using simple mixtures (i.e., C 2 H 6 in N 2 ) and multiple mixtures (i.e., H 2 , He, CO 2 , CH 4 , and O 2 in N 2 ) at different concentrations to correct interferences. A matrix calculation is proposed to calculate the relative concentrations.
Results: The method developed allows the measurement of gaseous species: light hydrocarbons, noble gases, sulfides, greenhouse gases, oxygen, hydrogen, and nitrogen in the same mixture. For each gas, the SDs and the limits of detection and quantification were calculated. The method was validated by comparing the concentrations of the measured gas species with the reference values of two standard gas cylinders.
Conclusions: Calibration of a complex gas mixture remains a challenge because fragmentation of molecules, especially hydrocarbons, reduces the sensitivity of the method. The method developed is suitable for continuous gas monitoring in a confined environment and can be implemented to perform experiments in underground structures: galleries, microtunnels (cells), and boreholes.
(© 2023 IFP Energies Nouvelles. Rapid Communications in Mass Spectrometry published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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