便携式X射线荧光光谱分析仪快速检测弹着痕迹
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摘要
目的探究便携式X射线荧光光谱分析仪快速检测纺织物客体上弹着痕迹的技术。方法选用QSZ92式9mm手枪,在不同距离射击白色纯棉布,制作48个弹着痕迹样本。用仪器检测弹着痕迹样本上的射击残留物,统计分析检测数据。结果仪器在塑料模式下以检测时间90s对利用QSZ92式9mm手枪制作的纺织物弹着痕迹样本中Sb、Sn、Pb、Cu、Zn元素具有良好的检测效果。其中,Sn、Sb元素在射击距离大于等于50cm的样本上无法被同时检出。结论便携式X射线荧光光谱仪适用于纺织物上弹着痕迹的临场检测,检测结果对推断射击距离有一定参考价值。
Objective To explore a technical method for testing the impact marks(left from gunshot residue) on textile materials with portable X-ray fluorescent spectrometer. Methods Chinese Norinco QSZ92 9 mm pistols were selected to shoot white cloth fabrics at six shooting distances(cm) of 15, 25, 50, 100, 300 and 500, having 48 impact marks made. One portable X-ray fluorescent spectrometer was used to test the gunshot residue on the impact marks, with the testing data collected for statistical analysis. Results The portable X-ray fluorescent spectrometer, set the test time of 90 s under plastic mode, showed effectual on detecting the elements of Sn, Sb, Pb, Cu and Zn from the impact marks left with shooting Chinese Norinco QSZ929 mm pistols. Sn and Sb elements can be detected at the same time within the shooting distance of 25 cm(including 25 cm),yet none for the distance of 50 cm(including 50 cm) and greater. Conclusions The portable X-ray fluorescent spectrometer is suitable for gunshot spot test by the impact marks on the textile materials, with the test results having referential value for inferring the shooting distance.
Objective To explore a technical method for testing the impact marks(left from gunshot residue) on textile materials with portable X-ray fluorescent spectrometer. Methods Chinese Norinco QSZ92 9 mm pistols were selected to shoot white cloth fabrics at six shooting distances(cm) of 15, 25, 50, 100, 300 and 500, having 48 impact marks made. One portable X-ray fluorescent spectrometer was used to test the gunshot residue on the impact marks, with the testing data collected for statistical analysis. Results The portable X-ray fluorescent spectrometer, set the test time of 90 s under plastic mode, showed effectual on detecting the elements of Sn, Sb, Pb, Cu and Zn from the impact marks left with shooting Chinese Norinco QSZ929 mm pistols. Sn and Sb elements can be detected at the same time within the shooting distance of 25 cm(including 25 cm),yet none for the distance of 50 cm(including 50 cm) and greater. Conclusions The portable X-ray fluorescent spectrometer is suitable for gunshot spot test by the impact marks on the textile materials, with the test results having referential value for inferring the shooting distance.
引文
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[12]胡浩浪,裴茂清,张亮.射击残留物颗粒的微观形态观察与元素成分分析[J].广东公安科技,2014(2):35-40.
[2]郝红飞,杨飞宇,秦真科,等.枪弹射击残留物检验方法[J].分析测试技术与仪器,2015,21(2):114-123.
[3]陈昌顺,杨瑞琴.射击残留物检验研究[J].中国人民公安大学学报,2009(1):13-17.
[4]郁海军.射击残留物检测方法的研究进展[J].科教文汇,2012(3):91-93.
[5]DALBY O,BIRKET J W.The evaluation of solid phase micro-extraction fibre types for the analysis of organic components in unburned propellant powders[J].Journal of Chromatography A,2010,1217(46):7183-7188.
[6]LICHTENBERG W.Methods for the determination of shooting distance[J].Forensic Science Review,1990,2(1):37-62.
[7]STICH S,BARD D,GROS L,et al.Raman microscopic identification of gunshot residues[J].Journal of Raman Spectroscopy,1998,29(9):787-790.
[8]WHITE R S,OWENS A D.Automation of gunshot residue detection andanalysis by scanning electron microscopy/energy dispersive-X-rayanalysis(SEM/EDX)[J].Journal of Forensic Science,1987,32(6):1595-1603.
[9]吉昂,卓尚军,李国会.能量色散X射线荧光光谱[M].北京:科学出版社,2011.
[10]赵奉奎.能量色散型X射线荧光光谱仪关键技术研究[D].南京:东南大学,2015.
[11]韩平,王纪华,陆安祥,等.便携式X射线荧光光谱分析仪测定土壤中重金属[J].光谱学与光谱分析,2012,32(3):826-829.
[12]胡浩浪,裴茂清,张亮.射击残留物颗粒的微观形态观察与元素成分分析[J].广东公安科技,2014(2):35-40.