由于微波等离子火调制,激光诱导分解光谱的信号质量得到了改善
Bingyu Wei1, Chen Yang2, Shujia Wu2
1Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou, 730000, China; School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China.
Analytica chimica acta
|September 12, 2024
概括
这项研究引入了微波等离子体火激光诱导分解光谱学 (MPT-LIBS),以提高元素检测灵敏度并减少信号变化. 新的MPT-LIBS方法以最小的样本损伤实现了显著的改进,为更广泛的工业应用铺平了道路.
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:
- 激光诱导分解光谱 (LIBS) 是元素分析的一个关键技术.
- 传统的LIBS面临着低灵敏度,高相对标准偏差 (RSD) 和潜在的样本损伤的挑战.
- 这些局限性阻碍了LIBS的广泛应用,特别是在核能等敏感行业.
研究的目的:
- 开发一种新的方法,以提高LIBS的敏感性和稳定性.
- 为了尽量减少在元素分析过程中对样品的损伤.
- 克服传统LIBS在工业应用中的局限性.
主要方法:
- 微波等离子火 (MPT) 与激光诱导分解光谱 (LIBS) 的集成,创建了MPT-LIBS技术.
- 使用低激光脉冲能量 (0.55mJ) 的铜 (Cu) 样本评估MPT-LIBS技术.
- 使用共聚焦显微镜进行样本除的表征.
主要成果:
- MPT-LIBS显示了Cu光谱线的显著信号增强,超过Cu I 521.82 nm的70倍,其他线的两倍.
- 对Cu光谱线的相对标准偏差 (RSD) 显著降低,例如,对于Cu I 521.82 nm,从11.48%降至1.36%,表明信号稳定性得到改善.
- 与传统的LIBS相比,Cu I 324.75 nm的检测极限从52.8 ppm提高到319 ppm,并且除面积最小增加.
结论:
- MPT-LIBS技术有效地提高了元素信号强度和稳定性,同时最大限度地减少了样品损坏.
- 这种方法为改善LIBS性能和扩大其在工业环境中的应用提供了有价值的指导.
- 该MPT-LIBS方法论具有显著的潜力,可以在各个领域推进LIBS技术.
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