Descrição
X-Ray Spectrom. 2003; 32: 396–401 The elemental composition (K, Ca, Ti, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Sr, Ba, Nd and Pb) of modern
coloured glasses was obtained by energy-dispersive x-ray fluorescence (EDXRF) spectrometry. This nondestructive
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.
; Valério, P 
