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Analytical chemistry. 2019 Sep 17;91(18):11731-11737. doi: 10.1021/acs.analchem.9b02306 Q16.72025

A Novel Two-Step Method for the Detection of Organic Gunshot Residue for Forensic Purposes: Fast Fluorescence Imaging Followed by Raman Microspectroscopic Identification

一种新的两步法用于有机枪弹残留物的检测:快速荧光成像与拉曼显微光谱鉴定 翻译改进

Shelby R Khandasammy  1, Alexander Rzhevskii  2, Igor K Lednev  1

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作者单位

  • 1 Department of Chemistry , University at Albany , SUNY, 1400 Washington Avenue , Albany , New York 12222 , United States.
  • 2 Thermo Fisher Scientific , 2 Radcliff Rd. , Tewksbury , Massachusetts 01876 , United States.
  • DOI: 10.1021/acs.analchem.9b02306 PMID: 31436951

    摘要 Ai翻译

    Gunshot residue (GSR) is potentially key evidence during a criminal investigation of a shooting accident. Current standardized forensic science methods target the detection of inorganic GSR (IGSR). In this proof-of-concept study, a new two-step method for the detection and identification of organic GSR (OGSR) is proposed. This method utilizes highly sensitive fluorescence hyperspectral imaging of a sample area to detect potential GSR particles, followed by confirmatory identification of the detected particles using Raman microspectroscopy. In this study, two different GSR samples on adhesive tape substrates were created. One sample was made by manually placing a known amount of OGSR particles onto an adhesive tape substrate. The second sample mimicked a real crime scene situation and had an unknown number of GSR particles mounted onto an adhesive tape substrate using a most common tape-lifting procedure for the recovery of GSR from the skin of a suspect and other surfaces. These two samples were subjected to the developed two-step analysis method. It was found that this method was accurately able to detect and identify all OGSR particles. Representative spectra of OGSR particles showed characteristic Raman peaks at 850 cm-1, 1287 cm-1, and 2970 cm-1. This methodology offers a promising means to meet current needs within the framework of GSR analysis by providing a way to accurately detect and identify OGSR.

    Keywords:organic gunshot residue; fluorescence imaging; raman microspectroscopy

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    期刊名:Analytical chemistry

    缩写:ANAL CHEM

    ISSN:0003-2700

    e-ISSN:1520-6882

    IF/分区:6.7/Q1

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    A Novel Two-Step Method for the Detection of Organic Gunshot Residue for Forensic Purposes: Fast Fluorescence Imaging Followed by Raman Microspectroscopic Identification