scholarly journals Heavy Metals Detection in Zeolites Using the LIBS Method

Atoms ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 98 ◽  
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.

scholarly journals Spectroscopic analysis of magnesium-aluminum alloys by laser induced breakdown spectroscopy

2018 ◽  
Vol 16 (36) ◽  
pp. 113-122
Author(s):  
Ali A-K. Hussain
Keyword(s):  
Electron Temperature ◽  
Electron Density ◽  
Spectral Lines ◽  
Molar Ratio ◽  
Stark Broadening ◽  
Boltzmann Plot ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Electron Density Increase ◽  
Atomic Lines

In this work, the spectra of plasma glow produced by Nd:YAG laser operated at 1.064 μm on Al-Mg alloys with same molar ratio samples in air were analyzed by comparing the atomic lines of aluminum and magnesium with that of strong standard lines. The effect of laser energies on spectral lines, produced by laser ablation, were investigated using optical spectroscopy, the electron density was measured utilizing the Stark broadening of magnesium-aluminum lines and the electron temperature was calculated from the standard Boltzmann plot method. The results that show the electron temperature increases in magnesium and aluminum targets but decreases in magnesium: aluminum alloy target, also show the electron density increase all the aluminum, magnesium and mix both them, It was found that the lines intensities at different laser peak powers increase when the laser peak power increases then decreases when the power continues to increase.

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

2019 ◽  
Vol 73 (4) ◽  
pp. 380-386 ◽  
Author(s):  
Sheng Niu ◽  
Lijuan Zheng ◽  
Abdul Qayyum Khan ◽  
Heping Zeng
Keyword(s):  
Heavy Metals ◽  
Laser Ablation ◽  
Laser Wavelength ◽  
Spectral Lines ◽  
Detection Sensitivity ◽  
Al2o3 Nanoparticles ◽  
Laser Irradiance ◽  
Breakdown Spectroscopy ◽  
Relative Standard ◽  
Laser Induced Breakdown

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.

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

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.

Research about Analysis of Heavy Metals in Liquid Jet by Laser-Induced Breakdown Spectroscopy

2012 ◽  
Vol 39 (2) ◽  
pp. 0215001 ◽  
Author(s):  
闫静 Yan Jing ◽  
丁蕾 Ding Lei ◽  
葛琳琳 Ge Linlin ◽  
王颖萍 Wang Yingping ◽  
郑海洋 Zheng Haiyang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Laser Induced Breakdown Spectroscopy ◽  
Liquid Jet ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Analysis of the heavy metals in atmospheric particulate matter using dual-pulsed laser-induced breakdown spectroscopy

2019 ◽  
Vol 48 (10) ◽  
pp. 1005006
Author(s):  
李业秋 Li Yeqiu ◽  
孙成林 Sun Chenglin ◽  
李 倩 Li Qian ◽  
岱 钦 Dai Qin ◽  
乌日娜 Wu Rina ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Particulate Matter ◽  
Pulsed Laser ◽  
Atmospheric Particulate Matter ◽  
Laser Induced Breakdown Spectroscopy ◽  
Atmospheric Particulate ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Accurate quantitative determination of heavy metals in oily soil by laser induced breakdown spectroscopy (LIBS) combined with interval partial least squares (IPLS)

2019 ◽  
Vol 11 (29) ◽  
pp. 3657-3664 ◽  
Author(s):  
Yu Ding ◽  
Guiyu Xia ◽  
Huiwen Ji ◽  
Xiong Xiong
Keyword(s):  
Heavy Metals ◽  
Rapid Detection ◽  
Detection Method ◽  
Pollution Assessment ◽  
Laser Induced Breakdown Spectroscopy ◽  
Oily Soil ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

A rapid detection method for heavy metals in oily soil is needed to provide accurate data support for in situ soil pollution assessment and restoration.

Detection of nutritional and toxic elements in Pakistani pepper powders using laser induced breakdown spectroscopy

2020 ◽  
Vol 12 (20) ◽  
pp. 2590-2598
Author(s):  
I. Rehan ◽  
K. Rehan ◽  
M. Z. Khan ◽  
S. Sultana ◽  
R. Muhammad ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Calibration Curve ◽  
Toxic Elements ◽  
Laser Induced Breakdown Spectroscopy ◽  
Elemental Distribution ◽  
Breakdown Spectroscopy ◽  
Trace Heavy Metals ◽  
Laser Induced Breakdown ◽  
Standard Calibration

Laser induced breakdown spectroscopy (LIBS) was applied to determine the elemental distribution of nutritional and trace heavy metals in pepper powders available in Pakistan using the standard calibration curve (CC)-LIBS technique.

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