Details

Autor(en) / Beteiligte

• Zhu, Z H
• Li, J M
• Hao, Z Q
• Tang, S S
• Tang, Y
• Guo, L B
• Li, X Y
• Zeng, X Y
• Lu, Y F

Titel

Isotopic determination with molecular emission using laser-induced breakdown spectroscopy and laser-induced radical fluorescence

Ist Teil von

• Optics express, 2019-01, Vol.27 (2), p.470-482

Ort / Verlag

United States

Erscheinungsjahr

2019

Quelle

Electronic Journals Library

Beschreibungen/Notizen

• 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 ( BO, BO, CN, and 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 BO, BO, CN, and 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.