确定挥发性有机化合物概况和人类残骸的检测能力,探测狗到人类骨头
Frédérique Ouimet1,2, Darshil Patel1,2, Marissa Tsontakis1
1Département de Chimie, Biochimie et Physique, Université du Québec à Trois-Rivières, 3351 boul. des Forges, Trois-Rivières, Québec, G8Z 4M3, Canada.
Forensic science international. Synergy
|January 6, 2025
概括
人类残骸检测 (HRD) 狗可以通过识别挥发性有机化合物 (VOCs) 来检测干燥的,化的骨头. 使用多种不同的骨遗骸进行训练可以提高HRD狗在气味检测中的效率.
科学领域:
- 法医科学 法医科学 法医科学
- 分析化学 分析化学
- 狗的行为 狗的行为
背景情况:
- 事证据表明,人类遗骸检测 (HRD) 狗对骨遗骸的检测存在挑战.
- 有限的研究存在于挥发性有机化合物 (VOCs) 排放的老骨头与最小的有机物质.
- 了解骨VOC对于优化HRD狗训练和运营效率至关重要.
研究的目的:
- 为了识别和表征从干燥,受天气影响的人类骨中排放的VOC.
- 为了评估HRD狗的检测性能,使用这些骨样本作为训练辅助工具.
主要方法:
- 从三具尸体的四种骨类 (关节骨,肋骨,腰骨,脊椎) 的VOCs使用吸附管收集.
- 使用全面的二维气体染色学飞行时间质谱法 (GC×GCTOFMS) 分析了样品.
- 在两次为期两天的试验中,记录了狗对骨样本的HRD反应.
主要成果:
- 总共检测到296种挥发性有机化合物,主要是芳香化合物和线性亚利法化合物.
- 骨类型影响了化学物质类别的分布,但VOC数量和强度在样本中是相似的.
- 尽管最初的错误检测,HRD犬的检测率有所改善,在每个试验的第二天达到100%,尽管最初的错误检测.
结论:
- HRD狗可以检测到老化的骨残骸,但需要各种各样的训练辅助工具.
- 挥发性有机化合物 (VOC) 形状的变化需要多样化的培训,以提高检测效率.
- 培训方案应包括一系列的骨遗骸,以解释与软组织分解相比不同的VOC.
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