显微拉曼光谱技术在印章油墨微量物证分析中的应用  

Application of micro-Raman spectroscopy technology in trace evidence analysis of printing ink

作　　者：薛晓康 商照聪 孙华 XUE Xiao-kang;SHANG Zhao-cong;SUN Hua(Shanghai Institute of Chemical Engineering Testing Co.,Ltd,Shanghai 200062,China;Shanghai Engineering Research Center of Chemicals Public Safety,Shanghai 200062,China;Shanghai Research Institute of Chemical Industry Co.,Ltd,Shanghai 200062,China)

机构地区：[1]上海化工院检测有限公司,上海200062 [2]上海化学品公共安全工程技术中心,上海200062 [3]上海化工研究院有限公司,上海200062

出　　处：《化学研究与应用》2024年第2期367-371,共5页Chemical Research and Application

基　　金：上海市“科技创新行动计划”社会发展科技攻关项目(22dz1200300)资助。

摘　　要：显微拉曼光谱技术耦合高灵敏度拉曼光谱和显微镜,能快速、灵敏、无需繁琐制样及可无损地检测微量物证样品,如印章油墨等。本文采用共聚焦显微拉曼光谱技术对常用的蓝色印章油墨进行分析。方法利用10倍放大物镜,激发功率4mW~8mW可调,曝光时间0.01s~0.03s可调,扫描次数50~80次可调。该分析方法不受载体纸张的影响,能分析出不同种类、完全渗透固化、μg级的印章油墨拉曼信号。这种光谱技术为将来拓展分析其他的微量物证样品打下良好的基础。Micro-Raman spectroscopy technology couples high sensitivity Raman spectroscopy with a microscope,which can quickly,sensitively,and non-destructive detect trace evidence samples,such as stamp inks,without the need for cumbersome sample prepara-tion.This article uses confocal micro-Raman spectroscopy technology to analyze commonly used blue stamp inks.The method utili-zes a 10x magnifying objective,with an adjustable excitation power of 4mW~8mW,an adjustable exposure time of 0.01s~0.03s,and an adjustable scanning frequency of 50-80 times.This analysis method is not affected by the carrier paper and can analyze Ra-man signals of different types of seal inks with complete penetration curing and microgram level.This spectral technology lays a solid foundation for expanding the analysis of other trace evidence samples in the future.

关 键 词：显微拉曼光谱 油墨 印章油墨 微量物证 

分 类 号：O657.3[理学—分析化学]