Agenda

04 Lug 2022 15:00

Innovative tools for the investigation on cultural heritage

Auditorium Danilo Mainardi, Edificio ALFA - Campus Scientifico Via Torino

Prof. Karel Lemr, Palacký University, Department of Analytical Chemistry, Faculty of Science

Titolo: Supercritical fluid chromatography, ion mobility, mass spectrometry imaging - promising tools for the investigation of cultural heritage

Abstract:
Mass spectrometry is a well-established analytical method in cultural heritage investigation. It is used stand-alone or coupled with gas or liquid chromatography. Nevertheless, this technique offers more alternatives. A few examples demonstrate mass spectrometric approaches that are less often used in this area. Supercritical fluid chromatography efficiently separates analytes, and its coupling to mass spectrometry enables the discrimination of plant gums. Ion mobility mass spectrometry was applied to investigate the origin of natural indigo. Mass spectrometry imaging is rarely used in artwork studies, but it can provide helpful information. Laser ablation (LA) revealed the depth profile of elements in the historical watches' material. The depth profiling of sixteenth-century oil painting showed the presence of different elements in multilayer samples which supported pigments' identification. The damage by LA (100 µm in diameter) was hardly visible. LA was also tested to follow changes in metal contents over time, analyzing wood samples across tree rings. Secondary ion mass spectrometry was applied to the investigation of Henri Matisse's painting, imaging the inorganic (pigments) and organic (binders) components of painting cross-sections. Matrix-assisted laser desorption ionization using c yanographene as a new matrix enabled imaging of oils and fatty acids. Desorption electrospray revealed dicarboxylic acids in the cross-sections of wall painting (the earliest Buddhist grottoes in ancient Central Asia) and a baroque-era painting. Low-temperature plasma probe was applied to analyze inks on calligraphy. Mass spectrometry is a micro-invasive and destructive technique but offers valuable information on studied materials with high selectivity and sensitivity. Besides commonly applied modes, the investigation of cultural heritage can benefit from a broader application of rarely used approaches, e.g., mass spectrometric imaging.

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L'evento si terrà in inglese

Organizzatore

Prof. Antonio Marcomini

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