期刊
ENVIRONMENTAL EARTH SCIENCES
卷 76, 期 16, 页码 -出版社
SPRINGER
DOI: 10.1007/s12665-017-6910-4
关键词
Cultural heritage; Limestone; Black crust; DP LIBS; Depth profile analysis
资金
- project Il restauro delle grandi opere in Puglia: l'innovazione attraverso le nanotecnologie e metodologie diagnostiche avanzate, P.O. Puglia FESR
- Bando Aiuti a Sostegno dei Partenariati Regionali per l'Innovazione [3Z3VZ46]
- Embrapa Instrumentation, Sao Carlos/SP, Brazil
The study of the degradation mechanisms of materials constituting historical buildings is very relevant in the context of cultural heritage preservation. In this work, a limestone sample collected from the masonry blocks of the entrance gate of historic Castello Svevo, Bari, Italy, was subjected to depth profile elemental analysis of the ablated black crust and the underlying limestone by double pulse laser-induced breakdown spectroscopy. The specific elemental components were identified and their concentrations along the sample profile analyzed, so allowing to identify the boundary between the weathered and unaltered rock. The laser-induced plasma stability, i.e., the absence of parameter changes during ablation, was verified to be constant and not to affect the elemental peak sizes during the entire depth analysis process when the plasma is confined in the ablation crater.
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