Open AccessIsotopic determination with molecular emission using laser-induced breakdown spectroscopy and laser-induced radical fluorescence
Author(s) -
Zhihao Zhu,
J. M. Li,
Zhongqi Hao,
Shisong Tang,
Yun Tang,
Lianbo Guo,
X. Y. Li,
Xiaoyan Zeng,
Yongfeng Lu
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.000470
Subject(s) - laser induced breakdown spectroscopy , laser induced fluorescence , spectroscopy , materials science , analytical chemistry (journal) , fluorescence , laser , emission spectrum , isotopic shift , isotope , isotopes of boron , fluorescence spectroscopy , interference (communication) , spectral line , boron , optics , nuclear magnetic resonance , chemistry , physics , chromatography , channel (broadcasting) , electrical engineering , organic chemistry , engineering , quantum mechanics , astronomy
Molecular emission can be used for isotopic analysis in laser-induced breakdown spectroscopy (LIBS) due to its large isotopic shift. However, spectral weakness and interference have become the main flaws in molecular isotopic analysis, causing deterioration of quantitative accuracy and sensitivity. Here, to overcome these problems, laser-induced radical fluorescence (LIRF) was applied to enhance the molecular spectra and eliminate the spectral interference. The root mean square errors of cross validation (RMSECVs) of boron and carbon isotopes ( 11 BO, 10 BO, 12 CN, and 13 CN) improved to 2.632, 5.721, 5.990, and 1.543 at.%, as compared with 16.96, 35.79, 57.10, and 13.89 at.%, respectively, obtained in the case without LIRF. The limits of detection (LoDs) of 11 BO, 10 BO, 12 CN, and 13 CN were 0.9858, 0.8470, 1.606, and 1.193 at.%, respectively. This work demonstrates the feasibility of LIBS-LIRF to achieve isotopic determination with high accuracy and sensitivity.