Modular ma-xrf scanner development in the multi-analytical characterisation of a 17th century Azulejo from Portugal

Sergio Augusto Barcellos Lins, Marta Manso, Pedro Augusto Barcellos Lins, Antonio Brunetti, Armida Sodo, Giovanni Ettore Gigante, Andrea Fabbri, Paolo Branchini, Luca Tortora, Stefano Ridolfi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A modular X-ray scanning system was developed, to fill in the gap between portable instruments (with a limited analytical area) and mobile instruments (with large analytical areas, and sometimes bulky and difficult to transport). The scanner has been compared to a commercial tabletop instrument, by analysing a Portuguese tile (azulejo) from the 17th century. Complementary techniques were used to achieve a throughout characterisation of the sample in a complete non-destructive approach. The complexity of the acquired X-ray fluorescence (XRF) spectra, due to inherent sample stratigraphy, has been resolved using Monte Carlo simulations, and Raman spectroscopy, as the most suitable technique to complement the analysis of azulejos colours, yielding satisfactory results. The colouring agents were identified as cobalt blue and a Zn-modified Naples-yellow. The stratigraphy of the area under study was partially modelled with Monte Carlo simulations. The scanners performance has been compared by evaluating the images outputs and the global spectrum.

Original languageEnglish
Article number1913
Pages (from-to)1-13
Number of pages13
JournalSensors
Volume21
Issue number5
DOIs
Publication statusPublished - 9 Mar 2021

Keywords

  • Azulejos
  • MA-XRF
  • Monte Carlo simulations
  • Raman spectroscopy

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