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在刑事技术领域,经常要求对案件现场提取的塑料、油漆、纤维、粘合剂等微量有机物证进行结构分析和种类认定,使用付立叶变换红外光谱仪连接红外显微镜所组成的透射/反射显微红外光谱仪系统进行光谱测定是一种强有力的手段。我所应用于高聚物薄膜和多层油漆的结构分析均取得满意的效果。实验部分一、多层油漆薄切片的制备实验使用西德SLEE程控自动冷冻切片机(MTZ型),它装有FEATHER不锈钢刀片的刀架和冷冻台。予先将3g明胶溶于10ml水中,置于70℃恒温箱使之融化。在冷冻台上滴加两滴上述明胶水溶液,将2mm×2mm的多层(3～5层)漆片垂直插
In the field of criminal technology, it is often required to carry out structural analysis and identification of trace organic compounds such as plastics, paints, fibers, adhesives and the like extracted from the scene of the case. Transmission / reflection microscopy using a Fourier transform infrared spectrometer coupled with an infrared microscope Infrared spectrometer system for spectrometry is a powerful tool. I applied to the structural analysis of polymer films and multi-layer paint have achieved satisfactory results. Experimental part First, the preparation of multi-layer paint thin slices Using West Germany SLEE program-controlled automatic frozen microtome (MTZ type), which is equipped with FEATHER stainless steel blade knife holder and the freezing table. 3g of gelatin was dissolved in 10ml of water and placed in a thermostat at 70 ° C to melt it. Two drops of the above gelatin aqueous solution were dropped on a freezing table, and a 2 mm × 2 mm multilayered (3-5 layer) paint was vertically inserted