Istituto per la Conservazione e la Valorizzazione dei Beni Culturali (ICVBC), National Research Council (CNR), Milan, Italy.
Anal Bioanal Chem. 2013 Feb;405(5):1733-41. doi: 10.1007/s00216-012-6594-2. Epub 2012 Dec 7.
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.
本研究旨在评估便携式拉曼和便携式中红外（FTIR）反射仪器在监测石膏基底上施加的合成处理方面的相关性，这在保护工作中是一个关键问题。由于某些聚合加固剂和保护剂会降解，因此它们的使用寿命相对较短，几年后表面应重新处理。因此，任何关于所应用产品的存在和组成、它们的化学转化及其在表面上的分布的信息都是必不可少的。为此，保护科学家应寻求和测试新的原位方法，这在建筑物的情况下尤为重要，因为它们的尺寸较大，因此需要进行广泛的测绘。通过分析一组用属于三类聚合物的不同量产品制备和处理的实验室标本，比较了便携式拉曼和便携式中红外反射仪器的有效性；光谱研究首次突出了便携式拉曼和便携式中红外反射仪器在检测常用于保护石膏的少量产品方面的局限性和优势。
