Enhancement of Laser-Induced Breakdown Spectroscopic Signals in a Liquid Jet with Glow Discharge

Abstract

In this work, emission signals of laser-induced breakdown (LIBS) plasma of a flowing liquid jet in the absence and presence of an air-supported glow discharge have been investigated. In combination with a needle-to-needle glow discharge, a Q-switched neodymium-doped yttrium aluminum garnet (Nd:YAG) laser (1064 nm, 5 ns) with power density ∼10W/cm was used to generate a plasma from a liquid jet. Emission lines of Mg, Ca, Al, Li, Na, and K all showed significant enhancements in the presence of the glow discharge. Lower continuum background was also observed. Mechanisms of the line emission enhancement and continuum radiation reduction were discussed.

Highly sensitive analysis of trace elements in aqueous solutions using surface-enhanced and discharge-assisted laser-induced breakdown spectroscopy

“…The temperature and electron density of the Al plasma with the spark discharge were higher than those of the Al plasma without the spark discharge, thereby realizing the re-excitation of the Al plasma. 28–31,33–36 Then more atoms and ions were excited to upper electronic states by discharge-assisted LIBS. Obviously, the heavy metal elements in the Al plasma were also excited to upper electronic states.…”

Combination of spark discharge and nanoparticle-enhanced laser-induced plasma spectroscopy

“…And the LIBS can implement in-situ detection and multi-element real-time rapid detection of samples. [1][2][3][4][5][6][7] In analyzing and detecting trace elements by the LIBS, sensitivity is crucial. [8][9][10][11] For traditional LIBS technology, the sensitivity mainly depends on the laser pulse energy, laser beam incident angle, beam focusing conditions, and the type of detection devices.…”

Comparison of sample temperature effect on femtosecond and nanosecond laser-induced breakdown spectroscopy

“…The technique provides many advantages compared to some classical analysis methods. For example, the sample to be analyzed may be a solid, liquid or gas [6][7][8][9]. It is also an easy, fast and convenient method to detect material composition, almost without sample preparation [10].…”