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Low molecular weight organic acid salts, markers of old fungi activity in wall paintings
Authors:
Nati
Salvadó
(Universitat Politècnica de Catalunya)
,
Salvador
Butí
(Universitat Politècnica de Catalunya)
,
Trinitat
Pradell
(Universitat Politècnica de Catalunya)
,
Victòria
Beltran
(Universitat Politècnica de Catalunya)
,
Gianfelice
Cinque
(Diamond Light Source)
,
Jordi
Juanhuix
(CELLS-ALBA Synchrotron)
,
Lídia
Font
(Museu d’Historia de Barcelona MUHBA)
,
Rosa
Senserrich
(Universitat de Barcelona)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Analytical Methods
State:
Published (Approved)
Published:
January 2016
Diamond Proposal Number(s):
10400
Abstract: Micro-Infrared Spectroscopy (μSR-FTIR) and X-ray diffraction (μSR-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.
Journal Keywords: Fungi; LMWOA salts; acid salts
Diamond Keywords: Paintings; Fungi
Subject Areas:
Chemistry,
Archaeological and Cultural Heritage
Instruments:
B22-Multimode InfraRed imaging And Microspectroscopy
Other Facilities: ALBA
Added On:
08/02/2016 16:16
Discipline Tags:
Cultural Heritage
Humanities
Chemistry
Technical Tags:
Spectroscopy
Infrared Spectroscopy
Synchtron-based Fourier Transform Infrared Spectroscopy (SR-FTIR)