基于β-CD@AuNPs结合乳酸的汗潜指印可视化研究  

Visual Exposure of Latent Sweat Fingermarks via Their Contained Lactic Acid Binding intoβ-CD@AuNPs

作　　者：黄锐[1,2,3] 范向洋 HUANG Rui;FAN Xiangyang(Criminal Investigation College of Southwest University of Political Science and Law,Chongqing 401120,China;Chongqing Forensic Engineering Research Center,Chongqing 401120,China;Chongqing Key Laboratory of Criminal Technology,Chongqing 401120,China)

机构地区：[1]西南政法大学刑事侦查学院,重庆401120 [2]重庆高校物证技术工程技术研究中心,重庆401120 [3]重庆市刑事技术重点实验室,重庆401120

出　　处：《刑事技术》2022年第3期239-245,共7页Forensic Science and Technology

基　　金：重庆市高等教育教学改革研究项目(203283);重庆市雏鹰计划研究项目(CY210301);重庆市教育委员会“成渝地区双城经济圈建设”科技创新重点项目(KJCXZD2020016)。

摘　　要：目的采用简单、便捷的方法制备β-CD@AuNPs并将其应用于汗潜指印中乳酸的检验。方法以HS-β-环糊精(HS-β-CD)为还原剂,通过微波加热方式制备β-CD@AuNPs。基于β-CD@AuNPs对汗潜指印中乳酸的主客体识别产生溶液颜色变化的原理,并使用数据处理软件对溶液颜色进行HSV数据化处理,从而实现汗潜指印中乳酸的可视化检测。结果β-CD@AuNPs对乳酸产生的颜色变化与乳酸的量存在数量关系,对新鲜和陈旧汗潜指印具有分辨能力。结论本文所建立的方法实现了对汗潜指印二维形态以及成分信息的同步可视化诊断。Objective To prepareβ-CD@AuNPs for exploration about visual exposure of sweat latent fi ngerprints which to have their contained lactic acid bound into the preparation.Methodsβ-CD@AuNPs was prepared through reduction of HS-β-cyclodextrin(HS-β-CD)under microwave heating.Lactic acid,one content-higher component of sweat,was bound intoβ-CD@AuNPs by way of inherent coalescence between them,resulting in the latent sweat fi ngerprints having turned out a different color ofβ-CD@AuNPs solution from that of either the blank or other alternative substance.HSV data processing software was adopted to handle the unveiling color so that the revealed sweat latent fi ngerprints were more vivid to be visually detected through their contained lactic acid.Results A quantitative relationship was present between the changing color ofβ-CD@AuNPs and the amount of lactic acid,demonstrating the ability ofβ-CD@AuNPs to distinguish fresh latent sweat fi ngerprints from the old ones.Conclusionsβ-CD@AuNPs had been innovatively utilized to detect lactic acid in sweat latent fi ngerprints,eligible for making the obtained results successively processed into HSV data for quantifi cation.Sweat latent fi ngerprints can be realized into synchronous retrieval of their visual two-dimensional patterns and composition information.

关 键 词：β-CD@AuNPs 汗潜指印 L-乳酸 HSV色彩空间 定性分析 

分 类 号：DF794.1[政治法律—诉讼法学]