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Title:
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Low molecular weight organic acid salts, markers of old fungi activity in wall paintings
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Author:
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Salvadó Cabré, Nativitat; Buti Papiol, Salvador; Pradell Cara, Trinitat; Beltran Sanchidrian, Victòria; Cinque, Gianfelice; Juanhuix, Jordi; Font, Lídia; Senserrich, Rosa
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Química; Universitat Politècnica de Catalunya. Departament de Física; Universitat Politècnica de Catalunya. AMPC - Anàlisi de materials de Patrimoni Cultural |
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Abstract:
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Micro-Infrared Spectroscopy (mSR-FTIR) and X-ray diffraction (mSR-XRD) with synchrotron light, Gas
Chromatography/Mass Spectrometry (CG/MS), Optical Microscopy (OM) and Scanning Electron
Microscopy (SEM/EDS) were used to identify and obtain the distribution of complex mixtures of calcium
salts of low molecular weight organic acids (LMWOA) in micro-layered micro-samples. Filamentous fungi
produce LMWOA that can react with metal cations producing stable salts. These substances were found
in the dark spots covering the surfaces of Saint Michael's Chapel wall paintings of the Royal Monastery of
Pedralbes in Barcelona linking them to old fungi activity. The presence of glycerol likewise related to the
fungi activity is also identified in the layers. |
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Subject(s):
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-Àrees temàtiques de la UPC::Arquitectura::Art::Pintura
-Àrees temàtiques de la UPC::Enginyeria dels materials
-Mural painting and decoration
-Molecular spectroscopy
-Gas chromatography
-Mass spectrometry
-X-rays -- Diffraction
-Pintura mural
-Espectroscòpia molecular
-Cromatografia de gasos
-Espectrometria de masses
-Raigs X -- Difracció |
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Rights:
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Document type:
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Article - Submitted version
Article |
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