Scientific Results

Portable Raman versus portable mid-FTIR reflectance instruments to monitor synthetic treatments used for the conservation of monument surfaces

Year: 2013

Authors: Conti C., Striova J., Aliatis I., Colombo C., Greco M., Possenti E., Realini M., Brambilla L., Zerbi G.

Autors Affiliation: Istituto per la Conservazione e la Valorizzazione dei Beni Culturali (ICVBC), National Research Council (CNR), Via Cozzi 53, 20125 Milan, Italy;
Istituto Nazionale di Ottica and LENS, Università di Firenze, National Research Council (CNR), Via Nello Carrara 1, 50019 Sesto Fiorentino, Italy;
Politecnico of Milano, Dip. Chimica, Materiali e Ingegneria Chimica “Giulio Natta”, Piazza Leonardo da Vinci 32, 20133 Milan, Italy

Abstract: This study aims to evaluate the relevance of portable Raman and portable mid-Fourier transform infrared (FTIR) reflectance instruments in monitoring the synthetic treatments applied on plaster substrates, a crucial issue in a conservation work. Some polymeric consolidants and protectives have a relatively short life owing to their degradation, and after some years the surface should be retreated. It follows that any information about the presence and composition of the products applied, their chemical transformations and their distribution on the surfaces is essential. For these purposes, conservation scientists should seek and test new in situ methods, and this is of utmost importance especially in the case of buildings, considering their large dimensions and consequent extensive mapping. The effectiveness of portable Raman and portable mid-FTIR reflectance instruments has been compared by analysing a set of laboratory specimens prepared and treated with variable amounts of products belonging to three classes of polymers; the spectroscopic investigation highlighted, for the first time, the limits and the advantages of portable Raman and portable mid-FTIR reflectance instruments in the detection of small amounts of products commonly employed for the conservation of plasters.

Journal/Review: ANALYTICAL AND BIOANALYTICAL CHEMISTRY

Volume: 405 (5)      Pages from: 1733  to: 1741

KeyWords: Portable Raman; Portable Fourier transform infrared; Polymer; Monitoring consolidants and protectives; Non invasive analysis
DOI: 10.1007/s00216-012-6594-2

Citations: 6
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English