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

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.

Enhancement of optical emission from laser-induced plasmas by combined spatial and magnetic confinement

“…However, one of its major drawbacks is its low sensitivity, which seriously hinders further improving the limit of detection (LOD) and restricts the further development and application of LIBS. To enhance the LIBS sensitivity, ultrashort-pulse and dual-pulse LIBS have been developed in recent years [13][14][15][16][17][18].…”

In situ analysis of steel melt by double-pulse laser-induced breakdown spectroscopy with a Cassegrain telescope

“…Because no sample pre-treatment is required and because of its versatile analysis of solids, liquids and gases, LIBS is most suitable for in situ and stand-off measurements [7]. In the metallurgical industry, LIBS can be used to perform in situ monitoring of melt composition during production, which is one of the most interesting and promising areas of LIBS research [8][9][10][11][12][13][14][15][16][17].…”

Silver jewelry microanalysis with dual-pulse laser-induced breakdown spectroscopy: 266 + 1064 nm wavelength combination

“…In this technique, the atoms produced in the laser-induced plasma are resonantly excited by second laser and the LIF of the atoms are monitored for high sensitivity analysis [10,11]. Resonanceenhanced laser-induced plasma spectroscopy (RELIPS) reported by Chan and Cheung is another interesting method to enhance atomic emission of the laser-induced plasma.…”