Compositional and Quantitative Microtextural Characterization of Historic Paintings by Micro-X-ray Diffraction and Raman Microscopy

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• 作者：Julia Romero-Pastor ; Adrian Duran ; Alejandro Basilio Rodr铆guez-Navarro ; Ren茅 Van Grieken ; Carolina Cardell
• 刊名：Analytical Chemistry
• 出版年：2011
• 出版时间：November 15, 2011
• 年：2011
• 卷：83
• 期：22
• 页码：8420-8428
• 全文大小：961K
• 年卷期：v.83,no.22(November 15, 2011)
• ISSN：1520-6882

文摘

This work shows the benefits of characterizing historic paintings via compositional and microtextural data from micro-X-ray diffraction (渭-XRD) combined with molecular information acquired with Raman microscopy (RM) along depth profiles in paint stratigraphies. The novel approach was applied to identify inorganic and organic components from paintings placed at the 14th century Islamic University鈥?i>Madrasah Yusufiyya鈥攊n Granada (Spain), the only Islamic University still standing from the time of Al-Andalus (Islamic Spain). The use of 渭-XRD to obtain quantitative microtextural information of crystalline phases provided by two-dimensional diffraction patterns to recognize pigments nature and manufacture, and decay processes in complex paint cross sections, has not been reported yet. A simple Nasrid (14th century) palette made of gypsum, vermilion, and azurite mixed with glue was identified in polychromed stuccos. Here also a Christian intervention was found via the use of smalt, barite, hematite, Brunswick green and gold; oil was the binding media employed. On mural paintings and wood ceilings, more complex palettes dated to the 19th century were found, made of gypsum, anhydrite, barite, dolomite, calcite, lead white, hematite, minium, synthetic ultramarine blue, and black carbon. The identified binders were glue, egg yolk, and oil.