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基于凝的水凝作为一种新型介质,可以有效地从爆炸后残留物中回收有机爆炸物:法医视角
Khalid Sajjad Feras1, Khaled Masoud1, Syed Mujeebuddin1
1College of Criminal Justice, Department of Forensic Sciences, Naif Arab University for Security Sciences, Riyadh, Saudi Arabia.
Forensic science international
|December 19, 2025
概括
基于凝的水凝显著改善了爆炸后的残留物收集,从无孔表面回收了80-95%的爆炸物. 这种环保的媒介为法医分析提供了经济高效的替代方案.
科学领域:
- 法医科学 法医科学 法医科学
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 爆炸后残留分析对于识别TNT,PETN和2-NT等爆炸物至关重要,以重建犯罪现场.
- 传统的残留物收集方法 (擦拭,溶剂洗) 是低效的,只能回收50-70%,容易受到污染和样品损失.
- 需要一种多功能,环保的介质来增强在不同表面的残留物回收.
研究的目的:
- 探索以凝为基础的水凝 (GHs) 作为一种创新的,生物相容的介质,用于爆炸后的残留物收集.
- 评估GH在从各种表面中回收三二 (TNT),五二四 (PETN) 和二二 (2-NT) 的效率.
- 评估GHs在法医调查中的潜在成本效益和现场适用性.
主要方法:
- 基于凝的水凝 (GHs) 用于从十个不同表面上收集TNT,PETN和2-NT的残留物,这些表面上加了爆炸性溶液.
- 废物回收量化,并使用气色谱-质谱法 (GC-MS) 分析样品进行鉴定.
- 统计验证 (ANOVA) 在三次实验中进行,以评估恢复率.
主要成果:
- 在无孔表面,GH的回收率为80-95%,在有孔表面,回收率为60-70%,即使存在灰尘,土壤和油等污染物.
- GC-MS分析证实了每个具有高灵敏度 (LOD 0.1-0.5μg/mL) 和明显质谱的爆炸物的识别.
- 初步的成本分析表明,与传统的拭子 (∼$2.00/样本) 相比,GH显著更具成本效益 (∼$0.50/样本).
结论:
- 基于凝的水凝为爆炸后残留物收集提供了一个有希望的,高效的和具有成本效益的解决方案,大大改进了传统方法.
- 温室气体增强在各种表面的残留物回收,包括受污染和多孔材料,具有高分析灵敏度.
- 这种创新方法有可能提升爆炸后调查的法医能力,以及环境监测和国土安全等相关领域.
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