Sensitivity improvement in the detection of V and Mn elements in steel using laser-induced breakdown spectroscopy with ring-magnet confinement

Abstract

<p>A new approach for improving the detection sensitivity of V and Mn in steel using LIBS with ring-magnet confinement has been presented.</p>

A critical review of recent progress in analytical laser-induced breakdown spectroscopy

“…This premise, first proposed by Mason and Goldberg in 1991, has only been observed in action by a couple of studies. For example, most recently, ring magnets (which combine the effects of spatial and magnetic confinement) were used to produce many-fold signal enhancements in the detection of V and Mn elements in steel [77].…”

Improving the Detection Sensitivity for Laser-Induced Breakdown Spectroscopy: A Review

“…The outer diameter, inner diameter, and height of the magnetic ring were 12.7, 3.2, and 6.3 mm, respectively. LODs of 11 ppm for V and 30 ppm for Mn were obtained with the magnetic ring, and these were lower than those obtained with a degaussed magnet (18 ppm for V and 41 ppm for Mn) [64]. Dong et al [66] used a combination of metal nanoparticlea, super-hydrophobic, and magnetic confiment to detect Cu in solution.…”

“…This method replaces the spatial constraint device around the sample with a magnetic field device. Under the magnetic field, charged particles inside the plasma that are excited on the surface of the sample will move in a circular or spiral motion because of the Lorentz force [64]. This may slow down expansion of the plasma plume, increase the emission duration, improve the probability of electron-ion recombination, and result in enhancement of the emission line intensities [65].…”

“…One of the simplest applications of magnetic confinement uses a magnetic ring as a magnetic field to constrain the plasma. Hao et al [64] designed a magnetic ring to investigate the effect of a magnetic field. The outer diameter, inner diameter, and height of the magnetic ring were 12.7, 3.2, and 6.3 mm, respectively.…”

Emission enhancement of femtosecond laser-induced breakdown spectroscopy by combining nanoparticle and dual-pulse on crystal SiO 2

“…To date, many methods have been used to improve the sensitivity of LIBS, such as double-pulse [9], plasma confinement [10], microwave [11], spark discharge [12,13], magnetic field [14], and flame [15]. Among methods mentioned above, double-pulse has been proved a very effective way to improve analytical performance of LIBS.…”