Evaluation of the Potential of Laser-Induced Breakdown Spectroscopy for Detection of Trace Element in Liquid

Abstract

The analytical figure of merit of the potential of laserinduced breakdown spectroscopy (LIBS) has been evaluated for detection of trace element in liquid. LIBS data of Mg, Cr, Mn, and Re were studied. Various optical geometries, which produce the laser spark in and at the liquid sample, were tested. The calibration curves for Mg, Cr, Mn, and Re were obtained at the optimized experimental conditions with bulk liquid and in liquid jet. It was found that measurements using a liquid jet provide better detection limits than bulk liquid measurements. The limits of detection (LOD) of Mg, Cr, Mn, and Re in the present liquid jet measurement are found to be 0.1, 0.4, 0.7, and 8 ppm, respectively. The LOD of Mg using Mg 279.55 nm was compared with the values found in other liquid work.

Improving laser-induced breakdown spectroscopy (LIBS) performance for iron and lead determination in aqueous solutions with laser-induced fluorescence (LIF)

“…Previous works have been devoted to the reduction of these effects in LIBS measurements, while keeping a reasonable ablation laser repetition rate, including liquid jet systems or strategies involving the evaporation of the liquid samples after deposition on solid substrates. 36,37 In this purpose, we developed a circulation cell providing a constant level of horizontal laminar flow of the liquid, coupled to a system of air circulation, which resulted in a highly reproducible laserliquid interaction. This shot-to-shot regularity in the LIBS plasma generation (shot-to-shot consistency in the ablated mass) straightforwardly ensured a reproducible overall LIBS-LIF operation.…”

Comparison study of two commercial spectrometers for heavy metal analysis of laser induced breakdown spectroscopy (LIBS)

“…In the first calibration curve in this system, Cu 374.47 nm emission line was employed, and the correlation coefficient was obtained as R 2 = 0.9. The limit of detection (LOD) calculation is based on the 3σ IUPAC (International Union of Pure and Applied Chemistry) definition [12,13]:…”

Ultrasonic nebulization-sample introduction system for quantitative analysis of liquid samples by laser-induced breakdown spectroscopy

“…Another study [8] in the literature lists LOD values of 0.4 ppm for Cr and 0.1 ppm for Mg from the liquid-jet experiments under optimized instrumental conditions and with the use of relatively higher laser pulse energies of 200 mJ. For comparison, 1.0 ppm LOD result presented in our study for Mg was obtained at 80 mJ/pulse laser energy and signal intensity increased linearly with respect to increase in laser pulse energy, as is given in Fig.…”

“…Analyzing elements directly from the bulk liquid [1,2] suffers from difficulties like splashing, bubble formation and shock wave formation after focusing the laser beam on liquids. In order to overcome those difficulties experienced in liquid analysis, plasma formation on liquid surfaces [3,4], on droplets [5,6], on flowing-jet liquids [7,8] and in cavitation bubbles [9] has been employed. Use of double pulses for plasma formation [10][11][12] has also been realized in liquid analysis by LIBS, with high sensitivity.…”