期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 181, 期 -, 页码 171-179出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2017.03.039
关键词
Non-invasive analysis; Colorants characterization; DRIFT spectroscopy; Surface analysis; In-situ technique; Chemometrics
类别
资金
- TOTH Associazione per la ricerca scientifica ONLUS
During the last years the need for non-invasive and non-destructive analytical methods brought to the development and application of new instrumentation and analytical methods for the in-situ analysis of cultural heritage objects. In this work we present the application of a portable diffuse reflectance infrared Fourier transform (DRIFT) method for the non-invasive characterization of colorants prepared according to ancient recipes and using egg white and Gum Arabic as binders. Approximately 50 colorants were analyzed with the DRIFT spectroscopy: we were able to identify and discriminate the most used yellow (i.e. yellow ochres, Lead-tin Yellow, Orpiment, etc.), red (i.e. red ochres, Hematite) and blue (i.e. Lapis Lazuli, Azurite, indigo) colorants, creating a complete DRIFT spectral library. The Principal Component Analysis-Discriminant Analysis (PCA-DA) was then employed for the colorants classification according to the chemical/mineralogical composition. The DRIFT analysis was also performed on a gouache painting of the artist Sutherland and the colorants used by the painter were identified directly in-situ and in a non-invasive manner. (C) 2017 Elsevier B.V. All rights reserved.
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