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- Title
NMR depth profiles as a non-invasive analytical tool to probe the penetration depth of hydrophobic treatments and inhomogeneities in treated porous stones.
- Authors
Tullio, Valeria Di; Proietti, Noemi; Capitani, Donatella; Nicolini, Ilaria; Mecchi, Anna Maria
- Abstract
Hydrophobic treatment is one of the most important interventions usually carried out in the conservation of stone artifacts and monuments. The analytical study reported in this paper was aimed at answering general questions such as the penetration depth of a hydrophobic treatment into a porous material, its capability to impair the water absorption, how the presence of a treatment may change the open porosity available to the water, and how a treatment may affect the diffusion of water inside a porous structure. Also, inhomogeneities in treated stones due to sharp variations of the amount of the absorbed product in the porous material were evidenced and scaled. The results of this fully non-invasive analytical study were rationalized in terms of new parameters obtained by a suitable process of nuclear magnetic resonance data. These analytical parameters reported here for the first time, namely the hydrophobic efficiency, the penetration depth, and angles describing changes in slope in depth profiles, gave important information in assessing the performance of a treatment. [Figure not available: see fulltext.]
- Subjects
RABIES; NUCLEAR magnetic resonance; POROUS materials; MAGNETIC resonance; VIRUS diseases
- Publication
Analytical & Bioanalytical Chemistry, 2011, Vol 400, Issue 9, p3151
- ISSN
1618-2642
- Publication type
Academic Journal
- DOI
10.1007/s00216-011-4968-5