Detection of Metal Imprints on Non-porous Surfaces

doi:10.19894/j.issn.1000-0518.200155

Chinese Journal of Applied Chemistry ›› 2021, Vol. 38 ›› Issue (1): 116-122.DOI: 10.19894/j.issn.1000-0518.200155

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Detection of Metal Imprints on Non-porous Surfaces

LU Si-Jia¹, XING Zhuo², YANG Rui-Qin^1*

¹School of Forensic Science, People's Public Security University of China, Beijing 100038, China;
²School of Policing Studies, Shanghai University of Political Science and Law, Shanghai 201701, China

Received:2020-05-22 Revised:2020-07-21 Published:2021-01-01 Online:2021-02-01
Supported by:
Innovation Personnel Training Project of People's Public Security University of China in 2020 (No.2020ssky006) and the Fund of Liu Yao Academician of Chinese Academy of Engineering (No.2019-YZ-01)

Abstract

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

CLC Number:

O641.4

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.

References

[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.

Detection of Metal Imprints on Non-porous Surfaces

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[1]	XING Zhuo,YANG Ruiqin. Chromogenic Detection of Imprints Left by Zinc Coatings on Human Skins by 2-(5-Bromo-2-pyridylazo)-5-(diethylamino)phenol [J]. Chinese Journal of Applied Chemistry, 2015, 32(9): 1093-1098.
[2]	GU Ning-Yu*, YU Dian-Bao, XIE Yuan-Yuan, YANG Zhen-Yu, ZHANG Rong-Bin, LIU Feng. Preparation and Electrochemical Performance of Pentaerythritol Tetrakis(2-methoxyethyl ether) Based Lithium Methoxy Oligo(oxyethylene) Sulfate Polymer Electrolytes [J]. Chinese Journal of Applied Chemistry, 2011, 28(01): 48-54.
[3]	Yu Zemu, Wang Erkang. TRANSFER OF GALLAMINE TRIETHIODIDE ACROSS WATER/NITROBENZENE INTERFACE [J]. Chinese Journal of Applied Chemistry, 1989, 0(4): 72-74.