Open AccessInvestigation of the self-absorption effect using time-resolved laser-induced breakdown spectroscopy
Author(s) -
Yun Tang,
Shixiang Ma,
Yanwu Chu,
Tao Wu,
Yuyang Ma,
Zhenlin Hu,
Lianbo Guo,
Xiaoyan Zeng,
Jun Duan,
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.27.004261
Subject(s) - laser induced breakdown spectroscopy , materials science , absorption (acoustics) , spectroscopy , absorption spectroscopy , optics , attenuation coefficient , laser , plasma , analytical chemistry (journal) , chemistry , physics , chromatography , quantum mechanics , composite material
Self-absorption seriously affects the accuracy and stability of quantitative analysis in laser-induced breakdown spectroscopy (LIBS). To reduce the effect of self-absorption, we investigated the temporal evolution of the self-absorption effect by establishing exponential calibration curves. Meanwhile, the temporal evolution mechanism of the self-absorption effect was also investigated. The results indicated that self-absorption was weak at the early stage of plasma expansion. For determination of manganese (Mn) in steel, as an example, the concentration of upper bound of linearity (C int ) was 2.000 wt. % at the early stage of plasma expansion (in a time window of 0.2-0.4 μs)-much higher than 0.363 wt. % at a traditional optimization time window (2-3 μs). The accuracy and stability of quantitative analysis at the time window of 0.2-0.4 μs was also much better than at the time window of 2-3 μs. This work provides a simple method for improving quantitative analysis performance and avoiding the self-absorption effect in LIBS.