Energy-dispersive x-ray fluorescence analysis of modern coloured glasses from Marinha Grande (Portugal)

by P. Val??rio, A. Markowicz, P. Kregsamer, M. F. Ara??jo, A. Pires De Matos, E. Chinea-Cano, C. Carvalho
X-Ray Spectrometry ()
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The elemental composition (K, Ca, Ti, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Sr, Ba, Nd and Pb) of modem coloured glasses was obtained by energy-dispersive x-ray fluorescence (EDXRF) spectrometry. This non-destructive technique is frequently used in the analysis of historical glass objects. Two reference glasses were also measured to assess the overall accuracy of the EDXRF method. Reference and unknown glasses were analysed without any preparation. The coloured glass samples studied belong to the Glass Museum of Marinha Grande and were chosen from two distinct collections, which were characterized by the different concentrations of some elements (K, Ti, Cr, Mn, Fe, Ba and Pb). The determined major elements allowed the identification of two raw materials used in glass manufacture, sand and lime. Multivariate statistical analysis, namely principal component extraction, simplified the identification of some of the colouring chemical elements, associating them with the different colours of the glass objects. Copyright (C) 2003 John Wiley Sons, Ltd.

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