| Laser-induced plasmas (LIPs) have acquired great interest in recent years as spectroscopic sources. The optical emission spectroscopy (OES) of LIPs, which has been called laser-induced plasma spectroscopy or laser-induced breakdown spectroscopy (LIBS) has become a powerful tool for the elemental analysis. As an analytical technique, LIBS has demonstrated its unique versatility, allowing fast contact-less analysis of almost any type of material and the possibility to adapt the technique to the special requirements of diverse practical analytical problems. The study of this paper is the LIPS application for the steel analysis which lays the foundation for the on-line liquid steel analysis in the future.This paper systematically discussed the domestic and international development of laser induced plasma spectrometry, especially the application of laser induced plasma spectrometry for metallurgy. The basic principle of laser induced plasma for elemental analysis is introduced. Based on laser induced plasma spectrometry, and for the purpose of quantitative analysis of trace element in liquid steel, we set up the experimental platform for the steel analysis. On the platform, we studied the solid carbon steel sample; as a result, we got the calibration curve of solid carbon steel with the limit of detection (LOD) 460ppm. The spectral line of melting carbon steel samples was also analyzed; we also studied the experimental factors which influence the strength and signal-to-noise ratio of the spectrum. |
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