http://www.cnr.it/ontology/cnr/individuo/prodotto/ID188462
Evaluation of Gypsum and Calcium Oxalates in Deteriorated Mural Paintings by Quantitative FTIR Spectroscopy (Articolo in rivista)
- Type
- Label
- Evaluation of Gypsum and Calcium Oxalates in Deteriorated Mural Paintings by Quantitative FTIR Spectroscopy (Articolo in rivista) (literal)
- Anno
- 2003-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1081/SL-120026615 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- B. Salvadori; V. Errico; M. Mauro; E. Melnik; L. Dei (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
- Articolo pubblicato anche nell'ed. online della rivista (ISSN 1532-2289), nel 2006 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Scopu (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Department of Chemistry and CSGI Consortium, University of Florence, Sesto Fiorentino (Firenze), Italy (literal)
- Titolo
- Evaluation of Gypsum and Calcium Oxalates in Deteriorated Mural Paintings by Quantitative FTIR Spectroscopy (literal)
- Abstract
- This study dealt with the development of a procedure based on quantitative FTIR spectroscopy to determine the amount of some contaminants in wall paintings, mortars, and stone micro-samples. As contaminants we selected gypsum, CaSO4·2H2O, and calcium oxalate monohydrate, CaC2O4·H2O, among the most common polluting substances present in architectural porous materials. Calibration curves of absorbance versus analyte concentration were determined by adopting both the internal and external standard methods. As internal standard we used Prussian blue, Fe3[Fe(CN)6]4, that presents an unique infrared peak at 2094 cm-1. The correlation coefficient for a linear fit was very good for every calibration, being in each case greater than 0.9900. Furthermore, the precision of the evaluation of gypsum and calcium oxalates varied in the range 8-15% and ca. 4% respectively. In order to verify the findings, some specimens, which came from real frescoes, were analysed both by DSC calorimetry and FTIR spectroscopy: we found a satisfactory match between the quantitative analyses performed by the two techniques. For the first time, the application of this method allowed the quantitative determination of the desulphatization power of the Ferroni-Dini method-based on the ammonium carbonate and barium hydroxide technique-in the conservation of mural paintings. (literal)
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