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dc.contributor.authorBeltran Sanchidrian, Victòria
dc.contributor.authorSalvadó Cabré, Nativitat
dc.contributor.authorButi Papiol, Salvador
dc.contributor.authorCinque, Gianfelice
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.identifier.citationBeltran, V. [et al.]. Micro infrared spectroscopy discrimination capability of compounds in complex matrices of thin layers in real sample coatings from artworks. "Microchemical journal", Gener 2015, núm. 118, p. 115-123.
dc.description.abstractThe presence of coating on manufactures either to protect them from the environment, or to give them specific properties—as well as simply to change their aspect—has been shown to be a constant practise throughout history. Their characterization is complex not only because of the inherent variability and diversity of the composition, but also due to the small amount of sample material available. A methodology to study those coatings using microFTIR is proposed. In some cases, the use of microSR-FTIR, which heavily increases spatial resolution particularly appropriate for the analysis of these heterogeneous samples, is also proposed. Data processing tools such as distribution maps of specific infrared bands and curve fitting facilitate the interpretation of the spectra and help identify heavily overlapped spectra. Through the identification of individual bands, it has been possible to discriminate materials and comprehend the interaction processes during aging. Infrared spectra from reference aged materials of known production dates and which are essential in understanding those processes are given. A set of selected case studies including materials of different chemical natures and various historical periods are presented: identification of guanine on the inner coating of a hope chest; determination of a protein glue coating from a gilded Baroque altarpiece; assessment of a beeswax superficial application during the historical restoration of a late 19th century canvas painting; identification of impurities of shellac wax in a shellac coating on a wood moulding from a medieval altarpiece; aging and reaction compounds in Pinus resin, drying oil and green copper pigment mixtures used as colour coatings on Baroque and modern desks.
dc.format.extent9 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria química::Indústries químiques::Colorants, pintures i vernissos
dc.subjectÀrees temàtiques de la UPC::Arquitectura::Art::Pintura
dc.subject.lcshFourier transform infrared spectroscopy
dc.subject.lcshVibrational spectra
dc.subject.lcshInfrared spectroscopy
dc.subject.lcshVarnish and varnishing
dc.subject.otherSynchrotron radiation
dc.subject.otherVibrational microspectroscopy
dc.subject.otherCultural heritage
dc.titleMicro infrared spectroscopy discrimination capability of compounds in complex matrices of thin layers in real sample coatings from artworks
dc.subject.lemacEspectroscòpia infraroja de transformada de Fourier
dc.subject.lemacRadiació sincrotrònica
dc.subject.lemacVernissos -- Identificació
dc.subject.lemacPintura barroca
dc.contributor.groupUniversitat Politècnica de Catalunya. AMPC - Anàlisi de materials de Patrimoni Cultural
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
local.citation.authorBeltran, V.; Salvadó, N.; Butí, S.; Cinque, G.
local.citation.publicationNameMicrochemical journal

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