Determination of Carbon Content in Steels Using Laser-Induced Breakdown Spectroscopy Assisted with Laser-Induced Radical Fluorescence

Jiaming Li, Zhihao Zhu, Ran Zhou, Nan Zhao, Rongxing Yi, Xinyan Yang, Xiangyou Li, Lianbo Guo, Xiaoyan Zeng, Yongfeng Lu

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Carbon is a key element for steel properties but hard to be determined by laser-induced breakdown spectroscopy (LIBS). Utilizing the combination of carbon in analytes and nitrogen in ambient gas to generate carbon-nitrogen (CN) radicals, LIBS assisted with laser-induced radical fluorescence (LIBS-LIRF) was proposed to resonantly excite radicals instead of atoms in plasmas. The CN radicals in the B2Σ-A2Π band were stimulated by a 421.60 nm laser wavelength and emitted 388.34 nm fluorescence. The results show that the spectral intensity of the CN radicals was enhanced by 2 orders of magnitude using LIBS-LIRF. Then carbon content in steels was accurately and sensitively determined without spectral interference. The limits of detection (LoDs) were 0.039 and 0.013 wt % in air and nitrogen gas, respectively. The limits of quantification (LoQs) were 0.130 and 0.043 wt % in air and nitrogen gas, respectively. This work demonstrated the feasibility of LIBS to realize reliable carbon determination in steel industry.

Original languageEnglish (US)
Pages (from-to)8134-8139
Number of pages6
JournalAnalytical chemistry
Volume89
Issue number15
DOIs
StatePublished - Aug 1 2017
Externally publishedYes

Fingerprint

Laser induced breakdown spectroscopy
Steel
Carbon
Fluorescence
Nitrogen
Lasers
Gases
Iron and steel industry
Air
Plasmas
Wavelength
Atoms

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Determination of Carbon Content in Steels Using Laser-Induced Breakdown Spectroscopy Assisted with Laser-Induced Radical Fluorescence. / Li, Jiaming; Zhu, Zhihao; Zhou, Ran; Zhao, Nan; Yi, Rongxing; Yang, Xinyan; Li, Xiangyou; Guo, Lianbo; Zeng, Xiaoyan; Lu, Yongfeng.

In: Analytical chemistry, Vol. 89, No. 15, 01.08.2017, p. 8134-8139.

Research output: Contribution to journalArticle

Li, Jiaming ; Zhu, Zhihao ; Zhou, Ran ; Zhao, Nan ; Yi, Rongxing ; Yang, Xinyan ; Li, Xiangyou ; Guo, Lianbo ; Zeng, Xiaoyan ; Lu, Yongfeng. / Determination of Carbon Content in Steels Using Laser-Induced Breakdown Spectroscopy Assisted with Laser-Induced Radical Fluorescence. In: Analytical chemistry. 2017 ; Vol. 89, No. 15. pp. 8134-8139.
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AU - Zhao, Nan

AU - Yi, Rongxing

AU - Yang, Xinyan

AU - Li, Xiangyou

AU - Guo, Lianbo

AU - Zeng, Xiaoyan

AU - Lu, Yongfeng

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N2 - Carbon is a key element for steel properties but hard to be determined by laser-induced breakdown spectroscopy (LIBS). Utilizing the combination of carbon in analytes and nitrogen in ambient gas to generate carbon-nitrogen (CN) radicals, LIBS assisted with laser-induced radical fluorescence (LIBS-LIRF) was proposed to resonantly excite radicals instead of atoms in plasmas. The CN radicals in the B2Σ-A2Π band were stimulated by a 421.60 nm laser wavelength and emitted 388.34 nm fluorescence. The results show that the spectral intensity of the CN radicals was enhanced by 2 orders of magnitude using LIBS-LIRF. Then carbon content in steels was accurately and sensitively determined without spectral interference. The limits of detection (LoDs) were 0.039 and 0.013 wt % in air and nitrogen gas, respectively. The limits of quantification (LoQs) were 0.130 and 0.043 wt % in air and nitrogen gas, respectively. This work demonstrated the feasibility of LIBS to realize reliable carbon determination in steel industry.

AB - Carbon is a key element for steel properties but hard to be determined by laser-induced breakdown spectroscopy (LIBS). Utilizing the combination of carbon in analytes and nitrogen in ambient gas to generate carbon-nitrogen (CN) radicals, LIBS assisted with laser-induced radical fluorescence (LIBS-LIRF) was proposed to resonantly excite radicals instead of atoms in plasmas. The CN radicals in the B2Σ-A2Π band were stimulated by a 421.60 nm laser wavelength and emitted 388.34 nm fluorescence. The results show that the spectral intensity of the CN radicals was enhanced by 2 orders of magnitude using LIBS-LIRF. Then carbon content in steels was accurately and sensitively determined without spectral interference. The limits of detection (LoDs) were 0.039 and 0.013 wt % in air and nitrogen gas, respectively. The limits of quantification (LoQs) were 0.130 and 0.043 wt % in air and nitrogen gas, respectively. This work demonstrated the feasibility of LIBS to realize reliable carbon determination in steel industry.

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