Monitoring the removal of soluble salts from ancient tiles by ion chromatography |
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Authors: | C. Borges, C. Caetano, J. Costa Pessoa, M.O. Figueiredo, A. Louren o, M. Malhoa Gomes, T.P. Silva,J.P. Veiga |
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Affiliation: | aCentro de Química Estrutural, Instituto Superior Técnico, Av. Rovisco Pais, 1096 Lisboa, Portugal bCentro de Cristalografia e Mineralogia, Al. Afonso Henriques, 41-4°E, 1100 Lisboa, Portugal cMuseu Nacional Azulejo, R. Madre Deus 4, 1900 Lisboa, Portugal |
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Abstract: | The application of ion chromatography, conductometry and total carbon analysis to the study of desalination of 18th century tiles and mortars is described. Ion chromatography is shown to be a simple and adequate technique for the identification and quantitative analysis of ions which are extracted during desalination. Chloride, nitrate, sulphate, carbonate, sodium, potassium, calcium and magnesium were always found in the immersion waters, and occasionally also nitrite and oxalate. |
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Keywords: | Ceramics Tiles Inorganic cations Inorganic anions |
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