为了鉴别文物表面常见的天然有机物,采用显微共聚焦拉曼光谱技术采集了古代常用的蛋白类、多糖类、脂肪酸类、树脂类4类6种有代表性的天然有机物的拉曼光谱。通过对皮胶、桃胶、蜂蜡、棕榈蜡、达玛树脂和琥珀标准样品的拉曼光谱分析,发现蛋白类的特征振动峰位于1657cm-1、1305-1252cm-1、1033cm-1及1003cm-1附近;多糖类的特征振动峰位于1463cm-1、1328cm-1、1258cm-1、1088cm-1、977cm-1等;蜡类的特征振动峰位于1470-11350em“区间,1659cm-1、1303cm-1、1636cm-1及1610cm-1;树脂类的特征振动峰位于1660-11650cm-1区间和1460~1440cm-1区间。在对6种天然有机物光谱特征分析的基础上,得出了使用拉曼光谱法可实现古代文物表面常见天然有机物种类鉴别的结论。
In order to identify the natural organic materials used in cultural relics, the confocal spectra of ancient known protein, polysaccharide, fatty acid and resin materials were obtained. micro - Raman Raman spectra of animal skin glue, peach tree gum glue, carnauba wax and Dammar tree resin, it Based on the was deduced that the peaks at 1657cm-1 , 1305cm-1 - 1252cm-1 , 1033cm-1 and 1003cm-1 are characteristic of proteins; the peaks at 1463cm-1, 1328cm-1, 1258cm-1, 1088cm-1, 977cm-1 are those of polysaccharides; the peaks at 1470cm-1- 1350cm-1, 1659cm-l, 1303cm-1, 1636cm-1, 1610cm-1 are those of wax; and the peaks of 1660cm-1 - 1650cm-1 , 1460cm-1 - 1440em-1 are the features of resin. Based on these Raman spectra, it is suggested that natural organic materials can be identified by confocal micro- Raman spectroscopy.