A comparative appraisal of Raman band ratioing and chemometric analysis for classification of ancient papyri
[EN] Papyri from past civilizations represent key information sources to understand historical societies and their culture. In general, the most critical information usually derives from the inks rather than the supports. In this work, we combine several analytical tools, including vibrational spect...
| Autores: | , , , , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2021 |
| País: | España |
| Recursos: | Universidad de León |
| Repositório: | BULERIA. Repositorio Institucional de la Universidad de León |
| OAI Identifier: | oai:buleria.unileon.es:10612/21353 |
| Acesso em linha: | https://www.sciencedirect.com/science/article/pii/S1296207421001370 https://hdl.handle.net/10612/21353 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Historia Antigua Química Carbon-based inks Vibrational spectroscopy Multivariate analysis SEM/EDX FT-IR Raman spectrometry 5505.09 Papirología 2301 Química Analítica 2301.17 Espectroscopia Raman 2301.20 Espectroscopia de Rayos X |
| Resumo: | [EN] Papyri from past civilizations represent key information sources to understand historical societies and their culture. In general, the most critical information usually derives from the inks rather than the supports. In this work, we combine several analytical tools, including vibrational spectroscopies (FT-IR and Raman) and SEM/EDX spectroscopy, to characterise the inks of various papyri in the Palau-Ribes collection (Barcelona, Spain). The Raman spectra corroborate the presence of soot-based inks as the primary type. We use a five-peak spectral model for the deconvolution of the first-order region of the Raman spectra, which allows us to derive information about the carbon type of the soot-based inks. Further, we propose various Raman band ratios for a thorough evaluation of the graphitization process of carbon and possible classification of the ancient inks. At the same time, we use multivariate analysis, mainly assisted by cluster analysis, principal component analysis, and the Fisher discriminant functions, to enable an excellent alternative way to verify the classification and differentiation of the inks safely as a function of the historical time |
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