Simultaneous detection of a submerged Cu target and bulk water by long-pulse laser-induced breakdown spectroscopy,Journal of Analytical Atomic Spectrometry

当前位置： X-MOL 学术 › J. Anal. At. Spectrom. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Simultaneous detection of a submerged Cu target and bulk water by long-pulse laser-induced breakdown spectroscopy
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2021-07-15 , DOI: 10.1039/d1ja00151e
Nan Li _{1,

2} , Kota Tanabe ₁ , Naoya Nishi ₁ , Ronger Zheng ₂ , Tetsuo Sakka ₁

Affiliation

The detection capability of long-pulse laser-induced breakdown spectroscopy (LIBS) for the simultaneous analysis of submerged solids and bulk water has been investigated with a Cu target immersed in a CaCl₂ solution. It is shown that a short pulse leads to the formation of Fraunhofer-type absorption lines at shorter delays and severe self-reversal structures at longer delays for Cu. In contrast, a long ns pulse leads to high-intensity clear emission lines free from self-reversal structures. Especially, the signal enhancement for the spectral lines of Ca by the long-pulse irradiation is more significant than that of Cu, with the line intensity being increased by more than 10 times, even though the breakdown threshold of the liquid is not reached. Also, the use of a long pulse broadens the variety of detectable elements. We found that the atomic lines of H and O in water can be observed, and the relative standard deviation (RSD) of the LIBS signal is reduced by nearly 3 times by employing O as an internal standard. The obtained results suggest that the simultaneous detection of submerged solids and bulk water can be well achieved by using a long pulse with a low laser pulse energy, enabling long-pulse LIBS to be more advantageous in underwater in situ applications.

中文翻译：

通过长脉冲激光诱导击穿光谱同时检测浸没的铜靶和大量水

研究了长脉冲激光诱导击穿光谱 (LIBS) 对同时分析浸没固体和大量水的检测能力，其中 Cu 靶浸入 CaCl _{2 中}解决方案。结果表明，短脉冲导致在较短的延迟下形成夫琅禾费型吸收线，并在较长的延迟下形成严重的 Cu 的自反转结构。相比之下，长 ns 脉冲导致高强度清晰的发射线没有自反转结构。特别是，长脉冲照射对Ca谱线的信号增强比Cu更显着，即使未达到液体的击穿阈值，谱线强度也增加了10倍以上。此外，长脉冲的使用拓宽了可检测元素的种类。我们发现可以观察到水中 H 和 O 的原子线，并且采用 O 作为内标使 LIBS 信号的相对标准偏差 (RSD) 降低了近 3 倍。现场应用。

更新日期：2021-08-03

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11