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Caractérisation in situ des degrés d'oxydation III et VI du chrome à l'état solide par spectrométrie de masse LAMMA

Abstract : The chromium in its oxudation states is known as being able to be carcinogen for man his environment. In consequence it is necessary to characterize perfectly these oxidation states and particularly in stainless steel fumes. The methodology developed hier is based on result obtaind in the course of analyses either of pure compounds (oxides or salts) or of compounds on support or included in matrices. From this study conclude that cluster ions formed in micro-plasma are representative of chemical environment of the studied element. In the same way we could evidenced the effect of compounds hydratation of these ionized clusters. For each sample type, we make up a histogram elementary ions repartition for cluster ions (negative characteristic of sulfate, nitrate...ions). In all cases we verified the composition determination with several other techniques such as E.S.C.A., I.R.T.F, R.X. and Raman. Our results allowed to conform the LAMMA analysis, evidencing advantages and limits on each one
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Serge Gondouin. Caractérisation in situ des degrés d'oxydation III et VI du chrome à l'état solide par spectrométrie de masse LAMMA. Autre. Université Paul Verlaine - Metz, 1986. Français. ⟨NNT : 1986METZ018S⟩. ⟨tel-01775710⟩

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