A joint use of Raman and infrared spectroscopies for the identification of natural organic media used in ancient varnishes
Fiche du document
2010
- handle: 10670/1.2jp98e
- hal: hal-00864287
- doi: 10.1002/jrs.2693
Ce document est lié à :
info:eu-repo/semantics/altIdentifier/doi/10.1002/jrs.2693
info:eu-repo/semantics/OpenAccess
Mots-clés
Natural resin Raman spectroscopy Gum Glue Oil ATR-FTIR FT-Raman Identification Terpenic resins Infrared spectroscopy natural organic substancesCiter ce document
Céline Daher et al., « A joint use of Raman and infrared spectroscopies for the identification of natural organic media used in ancient varnishes », HAL-SHS : histoire de l'art, ID : 10.1002/jrs.2693
Métriques
Partage / Export
Résumé
Various natural organic film-making media from several chemical families have been used as varnishes. An improvement in the identification of these materials by the combination of Raman and infrared spectroscopies is here presented. Fourteen unaged reference samples representative of resins, glues, gums and oils were analyzed. FT-Raman and IR spectra were all compared in order to discriminate the different classes of organic media by considering their spectroscopic features. It led to a flowchart for material discrimination based on simple, notable and specific criteria. It appears that the different families (gums, glues, oils and resins) and subfamilies (di/triterpenoids resins) are easily differentiated thanks to their specific structural composition. However, discerning between compounds from a same subgroup, for example diterpenoid resins, could be ambiguous because the spectra depend on the sample aspect, age and degradations.