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Theses

Caractérisation globale d'explosifs et de substances connexes (polymères, liants et plastifiants) à l'état de traces sur des prélèvements solides reposant sur la spectrométrie de masse à haute-résolution

Gabriel Gaiffe 1
1 CSOB - Chimie Structurale Organique et Biologique
IPCM - Institut Parisien de Chimie Moléculaire
Abstract : The manufacture and the illicit traffic of explosives result in the increasing use of explosive devices during attacks. The identification of explosives is a major issue for the fight against terrorism. However, the wide variety of energetic formulations make their characterization complex by a single technique. This thesis focused on mass spectrometry by seeking to improve the detection of explosive molecules embedded in energetic formulations and by investigating the processes involved in the technique of anion attachment used to improve the sensitivity of detection. It appears that chloride and nitrate attachment is the most appropriate technique to produce an intense signal. A hypothesis has been advanced based on CID and IRMPD experiments. The work also focused on characterizing the matrix surrounding the explosives to create a database. These analyzes are performed using ASAP and DART sources, to limit material losses, with the prospect of working on samples in trace amounts. These methods have shown their ability to produce mass spectra for fluorinated polymers that are difficult to analyze. In order to obtain a spectral fingerprint for the polymers and to be able to compare the spectra of these polymers, a Kendrick mass defect analysis method was developed and allowed to identify the polymers in a mixture. An analysis was made on real samples of explosives to compare the chemical species present pre and post explosion.
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Gabriel Gaiffe. Caractérisation globale d'explosifs et de substances connexes (polymères, liants et plastifiants) à l'état de traces sur des prélèvements solides reposant sur la spectrométrie de masse à haute-résolution. Polymères. Sorbonne Université, 2018. Français. ⟨NNT : 2018SORUS493⟩. ⟨tel-02612242⟩

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