Salvadó Nati, Butí Salvador, Nicholson James, Emerich Hermann, Labrador Ana, Pradell Trinitat
Dpt. d'Enginyeria Química, EPSEVG, Universitat Politècnica de Catalunya, Av. Víctor Balaguer s/n, 08800 Vilanova i la Geltrú, Barcelona, Spain.
Talanta. 2009 Jul 15;79(2):419-28. doi: 10.1016/j.talanta.2009.04.005. Epub 2009 Apr 10.
Synchrotron radiation X-ray diffraction (micro-SR-XRD) and Fourier transform infrared spectroscopy (micro-SR-FTIR) are used in the non-destructive identification of reaction and aging compounds from micrometric ancient painting layers. The combination of the micrometer size and non-destructive nature of the techniques together with the high resolution and brilliance of the synchrotron radiation has proved to be a procedure most advantageous for the study of reaction, aging and degradation processes. Copper, lead and calcium carboxylates and oxalates are determined in the chromatic, preparation and alteration layers from 15th century egg tempera and oil paintings. Their nature and crystallinity have been assessed. Some hypothesis about the mechanisms of development of both carboxylates and oxalates are presented.
同步辐射X射线衍射（微区同步辐射X射线衍射，micro-SR-XRD）和傅里叶变换红外光谱（微区同步辐射傅里叶变换红外光谱，micro-SR-FTIR）被用于从微米级古画颜料层中无损鉴定反应和老化化合物。这些技术的微米级尺寸、无损特性，再加上同步辐射的高分辨率和高亮度，已被证明是研究反应、老化和降解过程的极为有利的方法。在15世纪蛋彩画和油画的色彩层、底料层和变化层中测定了铜、铅羧酸盐和草酸盐。评估了它们的性质和结晶度。还提出了一些关于羧酸盐和草酸盐形成机制的假设。
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