Standard Reference Line Combined with One-Point Calibration-Free Laser-Induced Breakdown Spectroscopy (CF-LIBS) to Quantitatively Analyze Stainless and Heat Resistant Steel

Hongbo Fu; Huadong Wang; Junwei Jia; Zhibo Ni; Fengzhong Dong

doi:10.1177/0003702818770572

Standard Reference Line Combined with One-Point Calibration-Free Laser-Induced Breakdown Spectroscopy (CF-LIBS) to Quantitatively Analyze Stainless and Heat Resistant Steel

Appl Spectrosc. 2018 Aug;72(8):1183-1188. doi: 10.1177/0003702818770572. Epub 2018 Apr 18.

Authors

Hongbo Fu^{1

2}, Huadong Wang^{1

3}, Junwei Jia^{1

3}, Zhibo Ni¹, Fengzhong Dong^{1

2

3}

Affiliations

¹ 1 Anhui Provincial Key Laboratory of Photonic Devices and Materials, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, China.
² 2 Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, China.
³ 3 University of Science and Technology of China, Hefei, China.

PMID: 29667843
DOI: 10.1177/0003702818770572

Abstract

Due to the influence of self-absorption of major elements, scarce observable spectral lines of trace elements, and relative efficiency correction of experimental system, accurate quantitative analysis with calibration-free laser-induced breakdown spectroscopy (CF-LIBS) is in fact not easy. In order to overcome these difficulties, standard reference line (SRL) combined with one-point calibration (OPC) is used to analyze six elements in three stainless-steel and five heat-resistant steel samples. The Stark broadening and Saha-Boltzmann plot of Fe are used to calculate the electron density and the plasma temperature, respectively. In the present work, we tested the original SRL method, the SRL with the OPC method, and intercept with the OPC method. The final calculation results show that the latter two methods can effectively improve the overall accuracy of quantitative analysis and the detection limits of trace elements.

Keywords: CF-LIBS; Calibration-free laser-induced breakdown spectroscopy; OPC; Saha–Boltzmann plot; Stark broadening; one-point calibration; standard reference line.