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Non-invasive evidence of mercury soaps in painted miniatures on ivory
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SYSNO ASEP 0570630 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Non-invasive evidence of mercury soaps in painted miniatures on ivory Author(s) Garrappa, Silvia (UACH-T) ORCID, RID, SAI
Bezdička, Petr (UACH-T) SAI, RID, ORCID
Švarcová, Silvie (UACH-T) SAI, RID, ORCID
Hradilová, J. (CZ)
Pech, M. (CZ)
Hradil, David (UACH-T) RID, SAINumber of authors 6 Article number 219 Source Title European Physical Journal Plus. - : Springer - ISSN 2190-5444
Roč. 138, č. 3 (2023)Number of pages 14 s. Language eng - English Country DE - Germany Keywords miniature portraits on ivory ; non-invasive analytical approach ; metal soaps Subject RIV CB - Analytical Chemistry, Separation OECD category Analytical chemistry R&D Projects DG18P02OVV034 GA MK - Ministry of Culture (MK) Method of publishing Open access UT WOS 000946259300004 EID SCOPUS 85150181615 DOI 10.1140/epjp/s13360-023-03847-z Annotation This work focuses on a non-invasive study of two selected painted miniature portraits on ivory to describe the degradation processes resulting from the interaction between mercury-based and lead-based pigments with oils. In the studied miniatures, containing both lead white and cinnabar, the formation of metal soaps has been clearly detected. However, until now they have been identified exclusively as lead soaps. In this study, the formation of mercury soaps has been evidenced in painted artworks for the first time, together with the well-known lead soaps. The fully non-invasive analytical approach involved the use of large-area X-ray fluorescence scanning, X-ray powder diffraction and Fourier transform infrared spectroscopy accompanied by Raman spectroscopy. It enabled complex description of the miniatures, leading to both the identification and the deduction of approximate composition of mercury soaps. In addition, approximate calculations of the amount of pigments consumed by saponification unveiled the complex processes taking place in the oil-based paint containing both cinnabar and lead white, which were further studied within long-term model experiments monitored by both Fourier transform infrared spectroscopy and X-ray powder diffraction. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2023 Electronic address https://hdl.handle.net/11104/0341937
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