Laser-Induced Breakdown Spectroscopic (LIBS) Analysis of Trace Heavy Metals Enriched by Al2O3 Nanoparticles

We demonstrated a unique method for the detection of heavy metals, such as Ni, Cr, and Cd, at trace level in aqueous solutions by laser induced breakdown spectroscopy (LIBS) enriched by aluminum oxide (Al2O3) nanoparticles (NP) adsorption. Al2O3 NPs were used for the sample phase transformation and heavy metals pre-concentration because of its excellent adsorption capacity and sparse spectral lines. The influence of laser wavelength and laser irradiance on the signal intensity was investigated. With 45 mL solutions used for enrichment and adsorption, limits of detection obtained for Ni, Cr, and Cd were 9.61, 8.49, and 71.6 μg/L under 532 nm laser ablation, and 22.5, 20.4, and 83.8 μg/L under 1064 nm laser ablation, respectively. The relative standard deviations of all elements were about 12% or 13%. Moreover, Al2O3 NPs adsorption enrichment of target elements was verified and the detection sensitivity was improved by increasing the amount of sample solutions.

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Nanoparticle-Enhanced Laser Induced Breakdown Spectroscopy Using Copper–Silver and Nickel–Carbon Nanocomposites on Aluminium

International Journal of Nanoscience ◽

10.1142/s0219581x19400222 ◽

2019 ◽

Vol 18 (03n04) ◽

pp. 1940022

Author(s):

V. V. Kiris ◽

A. V. Butsen ◽

E. A. Ershov-Pavlov ◽

M. I. Nedelko ◽

A. A. Nevar

Keyword(s):

Laser Ablation ◽

Emission Intensity ◽

Aluminum Foil ◽

Spectral Lines ◽

Laser Induced Breakdown Spectroscopy ◽

Cu Nanoparticles ◽

Laser Plume ◽

Carbon Nanocomposites ◽

Breakdown Spectroscopy ◽

Laser Induced Breakdown

Composite Ag–Cu and Ni–C nanoparticles were synthesized by laser ablation and spark discharge in liquid, respectively. An amplification of the signal during laser induced breakdown spectroscopy was observed after deposition of the nanoparticles on the surface of an aluminum foil. The emission intensity of the laser plume increased from 2 to 20 times depending on the spectral lines used for the measurements. The intensity growth was higher for Ag–Cu nanoparticles.

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On the detection of heavy elements in the Euphorbia indica plant using laser-induced breakdown spectroscopy and laser ablation time of flight mass spectrometry

Journal of Analytical Atomic Spectrometry ◽

10.1039/c9ja00053d ◽

2019 ◽

Vol 34 (5) ◽

pp. 954-962 ◽

Cited By ~ 9

Author(s):

Abdul Jabbar ◽

Mahmood Akhtar ◽

Shaukat Mehmood ◽

Nasar Ahmed ◽

Zeshan Adeel Umar ◽

...

Keyword(s):

Mass Spectrometry ◽

Heavy Metals ◽

Laser Ablation ◽

Time Of Flight ◽

Laser Induced Breakdown Spectroscopy ◽

Ablation Time ◽

Breakdown Spectroscopy ◽

Flight Mass Spectrometry ◽

Laser Induced Breakdown ◽

Tof Ms

In this paper, we have addressed the phytoremediation, the ability to absorb heavy metals, of the Euphorbia indica plant by detecting heavy metals in its roots, stem and leaves using laser-induced breakdown spectroscopy (LIBS) and laser ablation time-of-flight mass spectrometry (LA-TOF-MS).

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Heavy Metals Detection in Zeolites Using the LIBS Method

Atoms ◽

10.3390/atoms7040098 ◽

2019 ◽

Vol 7 (4) ◽

pp. 98 ◽

Cited By ~ 2

Author(s):

Michaela Horňáčková ◽

Jozef Plavčan ◽

Michal Horňáček ◽

Pavol Hudec ◽

Pavel Veis

Keyword(s):

Heavy Metals ◽

Water Solution ◽

Spectral Lines ◽

Regression Coefficients ◽

Molar Ratio ◽

Y Zeolite ◽

Breakdown Spectroscopy ◽

Calibration Curves ◽

Laser Induced Breakdown ◽

Cadmium And Lead

In this study, a possibility of laser-induced breakdown spectroscopy (LIBS) for the analysis of zeolites containing copper, chromium, cobalt, cadmium, and lead in the concentration range of 0.05–0.5 wt.% is discussed. For the LIBS analysis, microporous ammonium form of Y zeolite with the silicon to aluminum molar ratio of 2.49 was selected. Zeolites, in the form of pressed pellets, were prepared by volume impregnation from the water solution using Co(CH3COO)2.4H2O, CuSO4.5H20, K2Cr2O7, PbNO3, and CdCl2 to form a sample with different amounts of heavy metals—Co, Cu, Cr, Pb, and Cd. Several spectral lines of the mentioned elements were selected to be fitted to obtain integral line intensity. To prevent the influence of the self-absorption effect, non-resonant spectral lines were selected for the calibration curves construction in most cases. The calibration curves of all elements are observed to be linear with high regression coefficients. On the other hand, the limits of detection (LOD) were calculated according to the 3σ/S formula using the most intensive spectral lines of individual elements, which are 14.4 ppm for copper, 18.5 ppm for cobalt, 16.4 ppm for chromium, 190.7 ppm for cadmium, and 62.6 ppm for lead.

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EXPRESS: Laser-Induced Breakdown Spectroscopy (LIBS) Combined with Temporal Plasma Analysis of C2 Molecular Emission for Carbon Analysis in Coal

Applied Spectroscopy ◽

10.1177/00037028211012399 ◽

2021 ◽

pp. 000370282110123

Author(s):

Hemalaxmi Rajavelu ◽

Nilesh J Vasa ◽

Satyanarayanan Seshadri

Keyword(s):

Elemental Carbon ◽

Partial Least Square ◽

Laser Induced Breakdown Spectroscopy ◽

Nanosecond Laser ◽

Calibration Model ◽

Breakdown Spectroscopy ◽

Persistence Time ◽

Relative Standard ◽

Laser Induced Breakdown ◽

Spectral Intensities

A benchtop Laser-Induced Breakdown Spectroscopy (LIBS) is demonstrated to determine the elemental carbon content present in raw coal used for combustion in power plants. The spectral intensities of molecular CN and C2 emission are measured together with the atomic carbon (C) and other inorganic elements (Si, Fe, Mg, Al, Ca, Na, and K) in the LIBS spectrum of coal. The emission persistence time of C2 molecule emission is measured from the coal plasma generated by a nanosecond laser ablation with a wavelength of 266 nm in the Ar atmosphere. The emission persistence time of molecular C2 emission along with the spectral intensities of major ash elements (Fe, Si, Al, and Ca) and carbon emissions (atomic C, molecular CN, and C2) shows a better relationship with the carbon wt% of different coal samples. The calibration model to measure elemental carbon (wt%) is developed by combining the spectral characteristics (Spectral intensity) and the temporal characteristics (Emission persistence time of C2 molecule emission). The temporal characteristic studies combined with the spectroscopic data in the PLSR (Partial Least Square Regression) model has resulted in an improvement in the root mean square error of validation (RMSEV), and the relative standard deviation (RSD) is reduced from 10.86% to 4.12% and from 11.32% to 6.04%, respectively.

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Gold Nanoparticle-Enhanced Laser-Induced Breakdown Spectroscopy and Three-Dimensional Contour Imaging of an Aluminum Alloy

Applied Spectroscopy ◽

10.1177/0003702820973040 ◽

2020 ◽

pp. 000370282097304

Author(s):

Amal A. Khedr ◽

Mahmoud A. Sliem ◽

Mohamed Abdel-Harith

Keyword(s):

Gold Nanoparticles ◽

Aluminum Alloy ◽

Three Dimensional ◽

Plasma Temperature ◽

Spectral Lines ◽

Laser Induced Breakdown Spectroscopy ◽

Al Alloy ◽

Boltzmann Plot ◽

Breakdown Spectroscopy ◽

Laser Induced Breakdown

In the present work, nanoparticle-enhanced laser-induced breakdown spectroscopy was used to analyze an aluminum alloy. Although LIBS has numerous advantages, it suffers from low sensitivity and low detection limits compared to other spectrochemical analytical methods. However, using gold nanoparticles helps to overcome such drawbacks and enhances the LIBS sensitivity in analyzing aluminum alloy in the current work. Aluminum was the major element in the analyzed samples (99.9%), while magnesium (Mg) was the minor element (0.1%). The spread of gold nanoparticles onto the Al alloy and using a laser with different pulse energies were exploited to enhance the Al alloy spectral lines. The results showed that Au NPs successfully improved the alloy spectral lines intensity by eight times, which could be useful for detecting many trace elements in higher matrix alloys. Under the assumption of local thermodynamic equilibrium, the Boltzmann plot was used to calculate the plasma temperature. Besides, the electron density was calculated using Mg and H lines at Mg(I) at 285.2 nm and Hα(I) at 656.2 nm, respectively. Three-dimensional contour mapping and color fill images contributed to understanding the behavior of the involved effects.

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