TY - JOUR
T1 - Investigation of excitation interference in laser-induced breakdown spectroscopy assisted with laser-induced fluorescence for chromium determination in low-alloy steels
AU - Li, Jiaming
AU - Liu, Xiaochun
AU - Li, Xiangyou
AU - Ma, Qiongxiong
AU - Zhao, Nan
AU - Zhang, Qingmao
AU - Guo, Liang
AU - Lu, Yongfeng
N1 - Funding Information:
This work was financially supported by the National Key Research and Development Program of China ( 2017YFB1104500 ), Department of Education of Guangdong Province ( 2018KQNCX057 ), the Science and Technology Project of Guangdong Province ( 2014B010131004 , 2014B010124002 , 2014B090903014 , 2015B090920003 , 2016B090917002 , 2016B090926004 , 201604040006 , and 2016A030313456 ), Department of Science and Technology of Guangdong Province ( 2018B030323017 ).
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2020/1
Y1 - 2020/1
N2 - Chromium determination in steels suffered from excitation interference in laser-induced breakdown spectroscopy assisted with laser-induced fluorescence (LIBS-LIF). In this work, excitation interference between target chromium atoms and matrix iron atoms was investigated in detail. Relative absorption strength (RAS) of chromium and iron was mathematically deduced and utilized to estimate the excitation interference theoretically. Standard calibration curves of LIBS and LIBS-LIF for chromium determination in low-alloy steels were experimentally established. The chromium line 359.35 nm with less interference in the RAS map provided better analytical performance (slope of 1.99×105 counts/ wt%, detection limit of 8.64 μg g−1, R2 of 0.992, average RSD of 2.89%), in accordance with the theoretical estimation. This work realized sensitive and accurate determination of trace chromium in low-alloy steels, even influenced by excitation interference. An effective estimation method was provided for evaluating excitation interference to choose a suitable excitation line.
AB - Chromium determination in steels suffered from excitation interference in laser-induced breakdown spectroscopy assisted with laser-induced fluorescence (LIBS-LIF). In this work, excitation interference between target chromium atoms and matrix iron atoms was investigated in detail. Relative absorption strength (RAS) of chromium and iron was mathematically deduced and utilized to estimate the excitation interference theoretically. Standard calibration curves of LIBS and LIBS-LIF for chromium determination in low-alloy steels were experimentally established. The chromium line 359.35 nm with less interference in the RAS map provided better analytical performance (slope of 1.99×105 counts/ wt%, detection limit of 8.64 μg g−1, R2 of 0.992, average RSD of 2.89%), in accordance with the theoretical estimation. This work realized sensitive and accurate determination of trace chromium in low-alloy steels, even influenced by excitation interference. An effective estimation method was provided for evaluating excitation interference to choose a suitable excitation line.
KW - Chromium
KW - Excitation interference
KW - Laser-induced breakdown spectroscopy
KW - Laser-induced fluorescence
KW - Steel
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U2 - 10.1016/j.optlaseng.2019.105834
DO - 10.1016/j.optlaseng.2019.105834
M3 - Article
AN - SCOPUS:85070937801
SN - 0143-8166
VL - 124
JO - Optics and Lasers in Engineering
JF - Optics and Lasers in Engineering
M1 - 105834
ER -