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便携式X射线荧光光谱仪作为快捷的无损分析技术,广泛应用于壁画文物的现场分析中。本文利用便携式X射线荧光光谱仪分析了西藏拉萨大昭寺转经廊壁画,选取部分样品,利用实验室X射线荧光分析,发现所分析颜料的主要显色元素具有一致性,并利用拉曼光谱确定了壁画颜料的成分。通过比较研究,发现便携式X射线荧光光谱仪可确定大部分色彩较为纯正的颜料的成分,同时,由于西藏拉萨大昭寺壁画颜料的杂多性,对于含砷的橙色颜料、含砷或含铅与含铁的黄色颜料、含铜砷的绿色颜料、含钙硫的白色颜料、群青与孔雀石的混合颜料则需结合拉曼光谱确定之。本研究工作显示,利用便携式X射线荧光光谱仪开展现场检测,可极大地减少实验室分析样品的取样数量,有利于壁画颜料的无损分析与微损分析。
Portable X-ray fluorescence spectrometer as a fast nondestructive analysis technology, widely used in murals on-site analysis. In this paper, a portable X-ray fluorescence spectrometer was used to analyze the murals of Jokhang Temple in Lhasa, Tibet, and some samples were selected. By using the laboratory X-ray fluorescence analysis, it was found that the main color elements of the analyzed pigments were consistent and determined by Raman spectroscopy Composition of mural paint. Through comparative study, we found that portable X-ray fluorescence spectrometer can determine the composition of most of the more pure color pigments. At the same time, due to the heterogeneous nature of mural pigments in Jokhang Temple in Lhasa, Tibet, for arsenic-containing orange pigments, Iron yellow pigment, copper arsenic green pigment, calcium sulfur white pigment, ultramarine and malachite mixed pigments need to be determined by Raman spectroscopy. The research work shows that the use of portable X-ray fluorescence spectrometer on-site testing, can greatly reduce the number of samples for laboratory analysis of samples is conducive to non-destructive analysis of mural pigments and micro-damage analysis.