摘要
纸张类客体是案件现场中常见的一类检材,其表面潜在手印的显现在物证检验鉴定过程中具有重要的意义。利用氨基酸敏感试剂N,N-二甲基-4-氨基苯甲醛(DMAB)对纸张表面潜在手印进行显现研究,结果表明,当浓度为0.4%时,DMAB对纸张表面潜在手印有很好的显现效果,显现手印在490 nm光源照射时,橙色护目镜下可观察到黄色荧光。该方法显现灵敏度高、显出手印纹线清晰、与背景反差较大,对于遗留30 d的陈旧性手印仍具有良好的显现效果。
Paper is one of the most common substrates in crime scenes,the detection of fingermarks on papers is crucial in the in- vestigation of crime scenes and evidence identification. In this work,experiments were conducted by amino acid sensitive reagent DMAB. The new method reported here exhibited good selectivity and sensitivity in the detection of fingermarks in various paper substrates. Moreover,the results showed that remarkable prints have been observed in 0. 4% （m/v） formulation under 490 nm il- lumination,with orange goggles,even for the fingermarks aged for 30 d,it still showed good ridges clarity and excellent contrast.
出处
《化学试剂》
北大核心
2017年第6期657-659,662,共4页
Chemical Reagents
基金
北京市科技计划资助项目(Z151100003315001)
中国人民公安大学基本科研课题资助项目(2016JKF01102)
关键词
DMAB
纸张表面
潜在手印
显现
物证鉴定
DMAB
paper substrates
latent fingermarks
development
evidence identification
