基于普鲁士蓝色的SERS侧流免疫试验,用于在法医领域超敏感的血迹定量检测
Long Chen1, Feng Wang2, Ziwen Guo1
1Department of Forensic Medicine, Nanjing Medical University, Nanjing, 211166, P.R. China.
Analytical and bioanalytical chemistry
|September 29, 2025
概括
法医科学家现在可以快速检测隐藏的人类血迹使用新的普鲁士蓝色修饰SERS侧流免疫测试条. 这种创新方法为刑事调查中关键证据分析提供了高度敏感性和选择性.
科学领域:
- 法医科学 法医科学 法医科学
- 分析化学 分析化学
- 生物技术是生物技术.
背景情况:
- 在刑事调查中,准确检测血液证据至关重要.
- 犯罪后的血迹往往会改变,需要敏感和选择性的检测方法.
- 现有的方法可能缺乏复杂现场场景所需的速度,精度或选择性.
研究的目的:
- 开发一种快速,精确和选择性的分析技术,用于识别人类的血污.
- 为了创建一个普鲁士蓝色修饰的表面增强拉曼散射 (SERS) 侧流免疫试验条 (SERS-LFIA) 增强血液证据检测.
- 克服当前检测改变或隐藏血液痕迹的方法的局限性.
主要方法:
- 使用普鲁士蓝 (PB) 作为SERS标签,利用其在生物静音区域 (1800-2800厘米-1) 的强烈单色信号.
- 开发了一种SERS-LFIA带,其中包含PB修饰的纳米粒子 (Au@PB NPs),用于反干扰检测.
- 评估了条带的视觉检测极限,线性响应范围,以及人类血红蛋白的SERS检测值.
主要成果:
- 赛尔斯-LFIA 试管实现了人体血红蛋白的视觉检测极限为 100 ng/mL,与商业合金试管匹配.
- 在1.00 ng/mL和100 μg/mL (R2 = 0.950) 之间表现出良好的线性反应.
- 达到高度敏感的SERS检测值,低至1.00 ng/mL,显著超过视觉检测.
结论:
- 开发的Au@PB NPs SERS-LFIA是一种有效的方法,用于在法医调查中现场检测血迹.
- 该技术具有高灵敏度,选择性和快速结果,适合复杂的现场条件.
- 该方法有利于法医证据的长期保存和可追溯性分析.
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