TY - JOUR
T1 - Accuracy improvement of quantitative analysis in spatially resolved fiber-optic laser-induced breakdown spectroscopy
AU - Lu, Wanjie
AU - Zhu, Zhihao
AU - Tang, Yun
AU - Ma, Shixiang
AU - Chu, Yanwu
AU - Ma, Yuyang
AU - Zeng, Qingdong
AU - Guo, Lianbo
AU - Lu, Yongfeng
AU - Zeng, Xiaoyan
N1 - Funding Information:
National Natural Science Foundation of China (No. 61705064); Project of the Hubei Provincial Department of Education (No. B2016183); Natural Science Foundation of the Hubei Province (2018CFB773).
Publisher Copyright:
© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
PY - 2018/11/12
Y1 - 2018/11/12
N2 - Fiber-optic laser-induced breakdown spectroscopy (FO-LIBS) has been employed in many applications because of the flexibility of optical fiber cable. However, the inhomogeneous elemental distribution of plasmas can cause a self-absorption effect and, hence, significantly hinder the determination of FO-LIBS. Here, to solve this flaw, we took iron (Fe), magnesium (Mg), and zinc (Zn) elements in aluminum alloy as examples to investigate the self-absorption reduction and accuracy improvement using spatially resolved FO-LIBS. Spatially resolved FO-LIBS means the spectra were collected at different positions along the direction parallel to the surface of the sample rather than at the center of the plasma. With this method, the self-absorption effect could be improved by selecting different acquisition positions along the X-axis. The root mean square error of cross-validations (RMSECV) for Fe, Mg, and Zn were reduced from 0.388, 0.348, and 0.097 wt. % to 0.172, 0.224, and 0.024 wt. %, respectively. Generally, spatial resolution is an effective method of self-absorption reduction and accuracy improvement in FO-LIBS.
AB - Fiber-optic laser-induced breakdown spectroscopy (FO-LIBS) has been employed in many applications because of the flexibility of optical fiber cable. However, the inhomogeneous elemental distribution of plasmas can cause a self-absorption effect and, hence, significantly hinder the determination of FO-LIBS. Here, to solve this flaw, we took iron (Fe), magnesium (Mg), and zinc (Zn) elements in aluminum alloy as examples to investigate the self-absorption reduction and accuracy improvement using spatially resolved FO-LIBS. Spatially resolved FO-LIBS means the spectra were collected at different positions along the direction parallel to the surface of the sample rather than at the center of the plasma. With this method, the self-absorption effect could be improved by selecting different acquisition positions along the X-axis. The root mean square error of cross-validations (RMSECV) for Fe, Mg, and Zn were reduced from 0.388, 0.348, and 0.097 wt. % to 0.172, 0.224, and 0.024 wt. %, respectively. Generally, spatial resolution is an effective method of self-absorption reduction and accuracy improvement in FO-LIBS.
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U2 - 10.1364/OE.26.030409
DO - 10.1364/OE.26.030409
M3 - Article
C2 - 30469915
AN - SCOPUS:85056797057
SN - 1094-4087
VL - 26
SP - 30409
EP - 30419
JO - Optics Express
JF - Optics Express
IS - 23
ER -