title: Quantitative Analysis of Carbon Steel with Multi-Line Internal Standard Calibration Method Using Laser-Induced Breakdown Spectroscopy.
abstract: A multi-line internal standard calibration method is proposed for the quantitative analysis of carbon steel using laser-induced breakdown spectroscopy (LIBS). A procedure based on the method was adopted to select the best calibration curves and the corresponding emission lines pairs automatically. Laser-induced breakdown spectroscopy experiments with carbon steel samples were performed, and C, Cr, and Mn were analyzed via the proposed method. Calibration curves of these elements were constructed via a traditional single line internal standard calibration method and a multi-line internal standard calibration method. The calibration curves obtained were evaluated with the determination coefficient, the root mean square error of cross-validation, and the average relative error of cross-validation. All of the parameters were improved significantly with the proposed method. The results show that accurate and stable calibration curves can be obtained efficiently via the multi-line internal standard calibration method.
authors.affiliation: National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, China.
authors.forename: Congyuan
authors.initials: C
authors.lastname: Pan
authors.affiliation: National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, China.
authors.forename: Xuewei
authors.initials: X
authors.lastname: Du
authors.affiliation: National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, China.
authors.forename: Ning
authors.initials: N
authors.lastname: An
authors.affiliation: National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zeng
authors.affiliation: Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, China.
authors.forename: Shengbo
authors.initials: S
authors.lastname: Wang
authors.affiliation: National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, China qiuping@ustc.edu.cn.
authors.forename: Qiuping
authors.initials: Q
authors.lastname: Wang
keywords: Calibration method; Carbon steel; Laser-induced breakdown spectroscopy (LIBS); Quantitative analysis