基于二维相关红外光谱鉴别鞋底材料  

Identification of Shoe-Sole Materials Based on Two-Dimensional Correlation Infrared Spectroscopy

作　　者：张景顺 吕小宝[2] 蔡能斌 于奎栋 Zhang Jingshun;LüXiaobao;Cai Nengbin;Yu Kuidong(Investigation Department,Shanghai Police College,Shanghai 200137,China;Material Evidence Identification Center of Shanghai Municipal Public Security Bureau,Shanghai 200083,China;Shanghai Key Laboratory of Field Evidence,Shanghai 200083,China)

机构地区：[1]上海公安学院侦查系,上海200137 [2]上海市公安局物证鉴定中心,上海200083 [3]上海市现场物证重点实验室,上海200083

出　　处：《激光与光电子学进展》2024年第9期501-506,共6页Laser & Optoelectronics Progress

摘　　要：鞋底是犯罪现场容易提取到的微量物证,使用傅里叶变换红外光谱法结合统计分析对检验鉴别鞋底物证具有重要意义。选择5个主要材料为顺丁橡胶的鞋底样品进行鉴别研究,主要橡胶材料相同的鞋底,其原始光谱相似,难以有效区分,因此选取1800~650 cm-1范围的指纹谱图进行二阶导数分析和二维相关光谱分析。实验结果表明:样品间二阶导数谱图差异不显著,而二维相关光谱中交叉峰的个数、位置和响应顺序存在差异,可以用来区分不同的鞋底样品。基于二维相关红外光谱可对鞋底物证进行完全鉴别,且二维相关光谱分析技术在法庭科学领域应用潜力巨大。Shoe soles leave trace evidence that can easily be extracted at crime scenes.The Fourier transform infrared spectroscopy,combined with statistical analysis,is highly significant for testing and identifying physical evidence from the sole.In this study,five sole samples that are primarily made of cisbutadiene rubber are selected for identification.The original spectra of the soles that the main materials are the same are identical and difficult to effectively distinguish;therefore,the fingerprint region spectra in the approximate range of 1800‒650 cm−1 are selected for the secondderivative analysis and twodimensional correlation spectral analysis.The results show that the differences in the spectra of the second derivatives are not significant between samples,whereas the number,position,and response order of the cross peaks in the twodimensional correlation spectra differ;this can be used to distinguish different sole samples.Therefore,using twodimensional correlation infrared spectroscopy,shoe soles are useful for identifying physical evidence.Thus,twodimensional correlation spectroscopy has great potential for application in the field of forensic science.

关 键 词：二维相关光谱分析 傅里叶变换红外光谱 橡胶鞋底 检验鉴别 

分 类 号：D918.93[政治法律—法学]