修改后的3D-PCSI-MS离子源应用于现场,通过集成真空采集来处理痕迹证据
Ebenezer H Bondzie1, Adewale Adehinmoye1, Brian T Molnar2
1Department of Chemistry, Illinois State University, Normal, Illinois 61704, United States.
Journal of the American Society for Mass Spectrometry
|December 8, 2023
概括
法医科学家现在可以使用新的3D打印圆喷雾电离 (3D-PCSI) 装置在犯罪现场选痕迹证据. 该工具集成了真空采集和化学分析,以实现更快,更全面的证据处理.
科学领域:
- 法医科学 法医科学 法医科学
- 分析化学 分析化学
- 质谱测量质量谱测量
背景情况:
- 痕迹证据 (头发,纤维,土壤,枪支残留物) 在刑事调查中至关重要.
- 目前的真空收集方法通常是有针对性的,缺少非有针对性的化学信息.
- 对法医证据的现场分析受到当前技术的限制.
研究的目的:
- 开发和描述一个新的3D打印形喷雾电离 (3D-PCSI) 源与集成真空收集.
- 允许在法医证据中对目标物理痕迹和非目标化学物种进行现场全面的选.
- 评估犯罪现场调查 (CSI) 应用新3D-PCSI方法的可靠性,收集效率和检测极限.
主要方法:
- 一个经过修改的3D打印的圆喷雾电离 (3D-PCSI) 源被设计成一个集成的真空收集.
- 该设备允许在单个单元中进行样本采集,船上提取,过和喷雾电离.
- 使用真实的法医证据类型和便携式质谱仪器 (MS) 测试了3D-PCSI方法.
主要成果:
- 3D-PCSI源证明了对法医痕迹证据的有效现场选.
- 综合系统尽量减少操作员在处理过程中处理证据.
- 通过虚假阳性/阴性率,收集效率和检测极限来评估系统可靠性.
结论:
- 开发的3D-PCSI设备为现场法医证据查提供了重大进展.
- 这项技术允许同时处理目标物理痕迹和非目标化学信息.
- 3D-PCSI方法提高了犯罪现场调查的效率和全面性.
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