Spectral Interference Elimination in Soil Analysis Using Laser-Induced Breakdown Spectroscopy Assisted by Laser-Induced Fluorescence

Rongxing Yi, Jiaming Li, Xinyan Yang, Ran Zhou, Huiwu Yu, Zhongqi Hao, Lianbo Guo, Xiangyou Li, Xiaoyan Zeng, Yongfeng Lu

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

The complex and serious spectral interference makes it difficult to detect trace elements in soil using laser-induced breakdown spectroscopy (LIBS). To address it, LIBS-assisted by laser-induced fluorescence (LIBS-LIF) was applied to selectively enhance the spectral intensities of the interfered lines. Utilizing this selective enhancement effect, all the interference lines could be eliminated. As an example, the Pb I 405.78 nm line was enhanced selectively. The results showed that the determination coefficient (R2) of calibration curve (Pb concentration range = 14-94 ppm), the relative standard deviation (RSD) of spectral intensities, and the limit of detection (LOD) for Pb element were improved from 0.6235 to 0.9802, 10.18% to 4.77%, and 24 ppm to 0.6 ppm using LIBS-LIF, respectively. These demonstrate that LIBS-LIF can eliminate spectral interference effectively and improve the ability of LIBS to detect trace heavy metals in soil.

Original languageEnglish (US)
Pages (from-to)2334-2337
Number of pages4
JournalAnalytical chemistry
Volume89
Issue number4
DOIs
StatePublished - Feb 21 2017

ASJC Scopus subject areas

  • Analytical Chemistry

Fingerprint Dive into the research topics of 'Spectral Interference Elimination in Soil Analysis Using Laser-Induced Breakdown Spectroscopy Assisted by Laser-Induced Fluorescence'. Together they form a unique fingerprint.

  • Cite this