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Analyse par spectroscopies Raman et infrarouge de matériaux naturels organiques issus d'objets du patrimoine : méthodologies et applications

Abstract : Natural organic substances such as resins, oils, animal glues and gums are involved in many aspects of the cultural heritage field. Their presence in different forms (raw, transformed, mixtures), with various conservation states, constitute a real challenge regarding their recognition and discrimination. The characterization of such media usually implies the use of separative techniques coupled to mass spectrometry which requires destructive samplings and specific analytical preparations. New approaches are here proposed, using alternative non destructive techniques, FT-Raman and infrared spectroscopies, for the identification and differentiation of natural organic substances. These methodologies are developed, based on multivariate procedures combining spectral decomposition and Principal Component Analyses. The different chemical families and sub-families were clustered, their ageing characterized, and the different components of a mixture were identified and quantified. All the methodological developments have been applied successfully to different types of materials and objects, representative of different cases encountered in the cultural heritage field: archaeological resins from a medieval site in Yemen, raw organic materials from an old commercial inventory of a color maker in Paris during the 19th century, and finally a corpus of varnished musical instruments from the collections of the "Musée de la Musique" (Paris).
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Submitted on : Wednesday, October 17, 2012 - 1:47:30 PM
Last modification on : Monday, December 14, 2020 - 9:53:06 AM
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  • HAL Id : tel-00742851, version 1

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Céline Daher. Analyse par spectroscopies Raman et infrarouge de matériaux naturels organiques issus d'objets du patrimoine : méthodologies et applications. Chimie théorique et/ou physique. Université Pierre et Marie Curie - Paris VI, 2012. Français. ⟨tel-00742851⟩

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