红外技术, 2016, 38 (2): 0174, 网络出版: 2016-04-05  

有机宝石近红外光谱分析

The Near-infrared Spectrum Analysis of Organic Gems
作者单位
昆明理工大学材料科学与工程学院,云南 昆明 650093
摘要
本文采用傅里叶变换红外光谱仪对有机宝石犀角、玳瑁、珊瑚、珍珠、琥珀有机宝石的近红外光谱进行归属和对比研究。结果表明:有机宝石近红外光谱以氨基酸的倍频、组合频为主,其中较强的两个吸收谱带为6800 cm-1± NH 伸缩振动第一倍频,5100 cm-1± NH 伸缩振动和酰胺II (CN伸缩振动,NH 弯曲振动偶合产生,主要属于CN 伸缩振动)的组合频。该研究结果可为有机宝石的鉴别提供新的方法,也为有机宝石的成分研究提供了一定的信息。
Abstract
This paper studied the NIR spectroscopy of rhino horn, tortoise shell, coral, peal and amber by using Fourier transform infrared spectrometer so as to explore the attribution of peaks and obtain the differences between them. The results show that the near infrared spectroscopy is mainly based on the overtone and combination of amino acids. Wherein two relatively strong absorption bands are around 6800 cm-1± for the first overtone of NH stretching vibration, 5100 cm-1± for the combination tone of NH stretching vibration and amide II(produced by vibration coupling of CN stretching vibration and NH bending vibration, mainly belong to CN stretching vibration). The findings may provide a new method for the identification of organic gems, but also provide some information as a component of organic gems.

李晓静, 祖恩东. 有机宝石近红外光谱分析[J]. 红外技术, 2016, 38(2): 0174. LI Xiaojing, ZU Endong. The Near-infrared Spectrum Analysis of Organic Gems[J]. Infrared Technology, 2016, 38(2): 0174.

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