对常见塑料瓶的检验方法研究

Study on the Inspection Method of Common Plastic Bottles

塑料瓶作为盛装容器常出现于纵火、交通肇事等犯罪现场,因此建立快速简便准确检验此类物证的方法十分必要。分别利用红外光谱法、差分拉曼光谱法、X射线荧光光谱法对收集的不同品牌、同一品牌不同系列的塑料瓶进行检验,对实验数据进行常用的化学计量学处理。结果表明,使用光谱法与化学计量学相结合的方法,能够更好地检验塑料瓶类物证,为公安侦查工作提供帮助。

As a container,plastic bottles often appear in the scene of arson,traffic accidents and other crimes,so it is necessary to establish a fast,simple and accurate method to test such physical evidence.Infrared spectroscopy,differential Raman spectroscopy and X-ray fluorescence spectroscopy were used to test the plastic bottles of different brands and different series of the same brand,and the commonly used chemometrics processing was carried out for the experimental data.The results show that the combination of spectroscopy and chemometrics can better examine the evidence of plastic bottles and provide help for police investigation.