非渗透性客体上金属印痕的显现

doi:10.19894/j.issn.1000-0518.200155

摘要/Abstract

摘要： 利用2-(5-溴-2吡啶偶氮)-5-二乙氨基酚显色剂,研究非渗透性客体上金属印痕的显现。考察接触和间隔时间、客体种类和转移次数对显现效果的影响。结果表明,皮肤接触金属工具90 s后,与非渗透性客体接触超过1 s,间隔时间在1～30 d内,转移5次以内时,客体表面遗留印痕均可有效显现。该方法可用以建立起犯罪嫌疑人与金属工具的联系,灵敏简便,在法庭科学领域有较好的应用前景。

关键词: 非渗透性客体, 金属印痕, 离子转移, 法庭科学

Abstract: A new method of visualizing metal imprints on non-porous surfaces was studied using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol as the chromogenic reagent. The affecting factors such as contact time, time elapse from the contact to the reaction, type of substrates and transfer times were studied. The results show that imprints with good quality are obtained when the contact time is more than 1 s, the time interval is between 1~30 days and the metal imprints within 5 deposition times after the contact between hands and metal tools for 90 s. This method has the advantages of high sensitivity and easy operation and is used to establish the connection between suspects and metal tools, which has potential applications in forensic science.

Key words: Non-porous surfaces, Metal imprints, Ion transfer, Forensic science

中图分类号:

O641.4

卢思佳, 邢卓, 杨瑞琴. 非渗透性客体上金属印痕的显现[J]. 应用化学, 2021, 38(1): 116-122.

LU Si-Jia, XING Zhuo, YANG Rui-Qin. Detection of Metal Imprints on Non-porous Surfaces[J]. Chinese Journal of Applied Chemistry, 2021, 38(1): 116-122.

参考文献

[1] 邢卓, 杨瑞琴. 2-(5-溴-2吡啶偶氮)-5-二乙氨基酚显现人体皮肤表面镀锌工具遗留印迹[J]. 应用化学, 2015, 32(9): 1093-1098.
   XING Z, YANG R Q. Chromogenic detection of imprints left by zinc coatings on human skins by 2-(5-bromo-2-pyridylazo)-5-(diethylamino) phenol[J]. Chinese J Appl Chem, 2015, 32(9):1093-1098.
[2] United States of America. Trace Metal Detection Techniques in Law Enforcement[M]. Bureau of Justice Statistics,1970.
[3] STEVENS J M, MESSLER H. The trace metal detection technique(TMDT): a report outlining a procedure for photographing results in color, and some factors influencing the results in controlled laboratory tests[J]. J Forensic Sci, 1974, 19(3): 496-503.
[4] GOLDMAN G L, THORNTON J I. A new trace ferrous metal detection reagent[J]. J Forensic Sci, 1976, 21(3): 625-628.
[5] LEE C W, PHIL M. The detection of iron traces on hands by ferrozine sprays: a report on the sensitivity and interference of the method and recommended procedure in forensic science investigation[J]. J Forensic Sci, 1986, 31(3): 920-930.
[6] ALMOG J, HIRSHFELD A, GLATTSTEIN B, et al. Chromogenic reagents for iron(II): studies in the 1,2,4-triazine series[J]. Anal Chim Acta, 1996, 322(3): 203-208.
[7] AVISSAR Y Y, SAGIV A E, DANIEL M, et al. Identification of firearms handling by the [Fe(PDT)₃]²⁺ complex: chemical and time-dependent factors[J]. Talanta, 2005, 67(2): 328-333.
[8] ALMOG J, BAR-OR K L, LEIFER A, et al. Detection of recent holding of firearms: improving the sensitivity of the PDT test[J]. Forensic Sci Int, 2014(241): 55-59.
[9] OLEJNICZAK A, CYGANIUK A W, LUKASZEWICZ J P. 1,2,4-Triazine-based chromogenic reagents for the detection of microtraces of various metals left on human skin[J]. J Forensic Sci, 2010, 55(3): 747-752.
[10] 邢卓, 杨瑞琴. 5-Br-PADAP显现金属工具遗留印迹的增强方法研究[J]. 化学试剂, 2015, 37(11): 1009-1014.
   XING Z, YANG R Q. Improvement techniques of the imprint left by metal tools on human skins with 5-Br-PADAP reagents[J]. Chem Reag, 2015, 37(11): 1009-1014.
[11] 杨瑞琴,邢卓,周红. 5-Br-PADAP分光光度法测定手掌面镀锌工具遗留印迹的锌含量[J]. 光谱学与光谱分析,2016, 36(12):4017-4020.
   YANG R Q, XING Z, ZHOU H. Spectrophotometric determination of the amount of zinc on the imprint left on hands by zinc coatings with 5-Br-PADAP as the chromogenic reagent[J]. Spectrosc Spectr Anal, 2016, 36(12): 4017-4020.
[12] BLEAY S M, GROVE L E, KELLY P F, et al. Non-invasive detection and chemical mapping of trace metal residues on the skin[J]. RSC Adv, 2014, 4(37): 19525.
[13] XING Z, YANG R Q, LIU W, et al. A modified trace metal detection test for secondary imprints on porous substrates: a preliminary study[J]. Forensic Sci Int, 2019(260): 28-38.
[14] 邢卓, 杨敦舜, 周红, 等. 渗透性客体上汗潜手印与金属遗留印迹联合显现方法研究[J]. 化学试剂, 2019, 41(3): 288-293.
   XING Z, YANG D S, ZHOU H, et al. Intergrated detection of latent fingerprints and imprints left by metallic tools on porous substrates[J]. Chem Reag, 2019, 41(3): 288-293.
[15] XING Z, LU S J, WANG A H, et al. A subsequent procedure for further deciphering weapons after application of the trace metal detection test (TMDT): proof of concept[J/OL]. Forensic Sci Int, 2020(310): 110253. http://dx.doi.org/10.1016/j.forsciint.2020.110253/pdf. [published online ahead of print].
[16] 魏复盛, 朱玉瑞, 沈乃葵. 高灵敏显色剂5-Br-PADAP[J]. 化学试剂,1980(1): 54-57.
   WEI F S, ZHU Y R, SHEN N K. High sensitive chromogenie reagent 5-Br-PADAP[J]. Chem Reag, 1980(1): 54-57.