拉曼光谱在法医纤维案件中的应用。

Application of Raman spectroscopy to forensic fibre cases.

作者信息

Lepot L, De Wael K, Gason F, Gilbert B

机构信息

Analytical Chemistry and Electrochemistry, University of Liège, Bldg. B6C, Sart Tilman, 4000 Liège, Belgium.

出版信息

Sci Justice. 2008 Sep;48(3):109-17. doi: 10.1016/j.scijus.2007.09.013.

DOI:10.1016/j.scijus.2007.09.013

PMID:18953798

Abstract

Five forensic fibre cases in which Raman spectroscopy proved to be a good complementary method for microspectrophotometry (MSP) are described. Absorption spectra in the visible range are indeed sometimes characteristic ofa certain dye but this one can be subsequently identified unambiguously by Raman spectroscopy using a spectral library. In other cases the comparison of Raman spectra of reference fibres and suspect fibres led to an improvement of the discrimination power. The Raman measurements have been performed directly on mounted fibres and the spectra showed only little interference from the mounting resin and glass. Raman spectroscopy is therefore a powerful method that can be applied in routine fibre analysis following optical microscopy and MSP measurements.

摘要

本文描述了五个法医纤维案件，其中拉曼光谱被证明是显微分光光度法（MSP）的一种很好的补充方法。可见范围内的吸收光谱有时确实是某种染料的特征，但随后可以通过使用光谱库的拉曼光谱明确识别该染料。在其他情况下，参考纤维和可疑纤维的拉曼光谱比较提高了鉴别能力。拉曼测量是直接在安装好的纤维上进行的，光谱显示来自安装树脂和玻璃的干扰很小。因此，拉曼光谱是一种强大的方法，可应用于光学显微镜和MSP测量后的常规纤维分析。