使用微波等离子火实现低能 fs-LIBS:开发便携式 fs-LIBS 测量系统的可行方法
Bingyu Wei1, Shengping Liu2, Liangyong Zhao3
1Frontiers Science Center for Rare Isotopes, State Key Laboratory of Chemistry for NBC Hazards Protection, School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China.
Analytical chemistry
|October 16, 2025
概括
一个新的微波等离子火与五秒激光诱导分解光谱学 (MPT-fs-LIBS) 相结合,显著提高了元素检测的灵敏度和稳定性. 这种MPT-fs-LIBS系统可以在低激光能量下对工业材料进行近乎无损的分析.
科学领域:
- 分析化学 分析化学
- 频谱学是一种光谱学.
- 等离子体物理学的物理学
背景情况:
- 五秒激光诱导分解光谱 (fs-LIBS) 提供快速的元素分析,但受到低激光脉冲能量需求的限制.
- 提高fs-LIBS性能,特别是在较低的能量下,对于更广泛的应用和最大限度地减少样品损伤至关重要.
研究的目的:
- 引入和评估一个新的MPT-fs-LIBS系统,以提高fs-LIBS的性能.
- 为了证明该系统在低激光能量下进行敏感元素检测和近乎无损的分析的能力.
主要方法:
- 微波等离子火 (MPT) 与 femtosecond激光诱导分解光谱 (fs-LIBS) 装置的集成.
- 利用秒激光脉冲和MPT生成的等离子来降低分解值并增强等离子辐射.
- 对Cu/Zn和Al合金和玻璃样品进行时间分辨率光谱分析.
主要成果:
- MPT-fs-LIBS系统将分解值降低到1μJ,并显著提高了等离子体发射强度和稳定性.
- 来自30μJ MPT-fs-LIBS的光谱信号超过了来自1.5mJ fs-LIBS的光谱信号,使得在较低的能量下可靠的检测.
- 与传统的fs-LIBS相比,微金属 (例如Mg) 的检测极限 (LOD) 降低了多达130倍.
结论:
- MPT-fs-LIBS系统为敏感的实时多元件分析提供了一个实用而紧的解决方案.
- 该方法允许对工业材料进行近乎无损的测试,样品损坏最小.
- 该系统的增强性能和便携性使其适用于各种分析应用.
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