Detection of trace phosphorus in steel using laser-induced breakdown spectroscopy combined with laser-induced fluorescence

X. K. Shen, H. Wang, Z. Q. Xie, Y. Gao, H. Ling, Y. F. Lu

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

Monitoring of light-element concentration in steel is very important for quality assurance in the steel industry. In this work, detection in open air of trace phosphorus (P) in steel using laser-induced breakdown spectroscopy (LIBS) combined with laser-induced fluorescence (LIF) has been investigated. An optical parametric oscillator wavelength-tunable laser was used to resonantly excite the P atoms within plasma plumes generated by a Q-switched Nd:YAG laser. A set of steel samples with P concentrations from 3.9 to 720 parts in 10 6(ppm) were analyzed using LIBS-LIF at wavelengths of 253.40 and 253.56 nm for resonant excitation of P atoms and fluorescence lines at wavelengths of 213.55 and 213.62 nm. The calibration curves were measured to determine the limit of detection for P in steel, which is estimated to be around 0.7 ppm. The results demonstrate the potential of LIBS-LIF to meet the requirements for on-line analyses in open air in the steel industry.

Original languageEnglish (US)
Pages (from-to)2551-2558
Number of pages8
JournalApplied optics
Volume48
Issue number13
DOIs
StatePublished - May 1 2009

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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