Improved LIBS limit of detection of Be, Mg, Si, Mn, Fe and Cu in aluminum alloy samples using a portable Echelle spectrometer with ICCD camera

Tawfik, Walid

doi:10.1016/j.optlastec.2007.04.004

Cited by 138 publications

(49 citation statements)

References 24 publications

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“…The spectrometer requires periodic internal calibration using mercury-argon lamp since the spectrum shifts due to variations in laboratory conditions [18]. Additionally, so as to obtain improved results, emission lines with no or minimal interference, due to the sample matrix and lines giving maximum signal intensity for metal powders were selected.…”

Section: Optimisation Of Experimental Conditionsmentioning

confidence: 99%

“…The limit of detection of LIBS was calculated based on International Union of Pure and Applied Chemistry (IUPAC) definition using the certified reference materials used for calibration with the lowest concentration (mass fraction) of each analyte [13,18,43,44]. Accordingly it was calculated using the equation: limit of detection (LOD) = 3σ b /S, where σ b is the standard deviation of the background (noise level) and S is the calibration sensitivity (S = slope of the calibration curve) which is the ratio of the line intensity to the concentration.…”

Section: Limit Of Detectionmentioning

confidence: 99%

“…The self-absorption of emission lines is another impediment for the exact determination of elemental concentration due to nonhomogeneous nature of the plasma. This could lead to non-linearity in LIBS signal intensity when plotted against concentration of the emitting elements and in turn affects the accuracy of quantitative analysis [18,23]. The RSDs of the methods were ≤ 20% and ≤ 5% for LIBS and F-AAS, respectively.…”

Section: Quality Controlmentioning

confidence: 99%

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Assessment of the concentration of Cr, Mn and Fe in sediment using laser-induced breakdown spectroscopy

Mekonnen¹,

Ambushe²,

Chandravanshi³

et al. 2012

Bull. Chem. Soc. Eth.

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ABSTRACT. In the present study, laser-induced breakdown spectroscopy (LIBS) has been applied for the determination of levels of Cr, Mn and Fe in sediment samples and the results have been compared with that of flame-atomic absorption spectroscopy (F-AAS). Fourteen sediment samples were collected from Tinishu Akaki River (TAR), Addis Ababa, Ethiopia. Pellets of 24 mm in diameter and 3−5 mm in thickness were prepared using a manual hydraulic press under a pressure of 8000 psi by mixing finely ground sediment samples with boric acid. The concentrations of Cr, Mn and Fe were successfully determined by Q-switched Nd:YAG laser at 1064 nm. Quantification of these metals was conducted against certified reference materials of sediments and soils. The LIBS results for the elements varied from 0.060-0.707 mg/g for Cr, 0.895-3.64 mg/g for Mn and 26.9-71.8 mg/g for Fe. The F-AAS results varied from 0.061-1.37 mg/g for Cr, 1.24-4.46 mg/g for Mn and 49.0-83.3 mg/g for Fe. TAR was found to be heavily polluted with Cr.

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Section: Optimisation Of Experimental Conditionsmentioning

confidence: 99%

Section: Limit Of Detectionmentioning

confidence: 99%

Section: Quality Controlmentioning

confidence: 99%

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Assessment of the concentration of Cr, Mn and Fe in sediment using laser-induced breakdown spectroscopy

Mekonnen¹,

Ambushe²,

Chandravanshi³

et al. 2012

Bull. Chem. Soc. Eth.

View full text Add to dashboard Cite

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“…The schematic diagram of the LIPS setup we used is similar to the standard LIPS shown before [18]. The LIPS experiment was carried out using a Spectrolaser 7000 (Laser Analysis Technologies, Australia), an integrated system consisting of a nanosecond excitation laser, focusing optics, a sample chamber with rotational and translational stages, an optical spectrograph, a gated CCD detector, and a camera to adjust the focusing position on the sample.…”

Section: The Lips Systemmentioning

confidence: 99%

Damage Profile of HDPE Polymer using Laser-Induced Plasma

Tawfik

Farooq

Alahmed

2014

Journal of the Optical Society of Korea

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In this paper we studied the laser-induced crater depth, mass, and emission spectra of laser-ablated high-density polyethylene (HDPE) polymer using the laser-induced plasma spectroscopy (LIPS) technique. This study was performed using a Nd:YAG laser with 100 mJ energy and 7 ns pulse width, focused normal to the surface of the sample. The nanoscale change in ablated depth versus number of laser pulses was studied. By using scanning electron microscope (SEM) images, the crater depth and ablated mass were estimated. The LIPS spectral intensities were observed for major and minor elements with depth. The comparison between the LIPS results and SEM images showed that LIPS could be used to estimate the crater depth, which is of interest for some applications such as thin-film lithography measurements and online measurements of thickness in film deposition techniques.

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“…Laser Induced Breakdown Spectroscopy (LIBS) as an analytical technique has grown spectacularly in the past few years to the extent that it is now being used even in remote analysis in the Mars mission confirming its experimental maturity. [2][3][4][5][6][7][8][9] The concept of LIBS relates to the interaction of a focused high power laser beam with matter, inducing the plasma on the surface of the matter and recording the atomic emission spectra from the plasma. The irradiation with high power laser pulses (usually nanosecond time scale) leads to material ablation and formation of plasma.…”

Section: Introductionmentioning

confidence: 99%

Homogeneity testing and quantitative analysis of manganese (Mn) in vitrified Mn-doped glasses by laser-induced breakdown spectroscopy (LIBS)

et al. 2014

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Laser-induced breakdown spectroscopy (LIBS), an atomic emission spectroscopy method, has rapidly grown as one of the best elemental analysis techniques over the past two decades. Homogeneity testing and quantitative analysis of manganese (Mn) in manganese-doped glasses have been carried out using an optimized LIBS system employing a nanosecond ultraviolet Nd:YAG laser as the source of excitation. The glass samples have been prepared using conventional vitrification methods. The laser pulse irradiance on the surface of the glass samples placed in air at atmospheric pressure was about 1.7×109 W/cm2. The spatially integrated plasma emission was collected and imaged on to the spectrograph slit using an optical-fiber-based collection system. Homogeneity was checked by recording LIBS spectra from different sites on the sample surface and analyzing the elemental emission intensities for concentration determination. Validation of the observed LIBS results was done by comparison with scanning electron microscope- energy dispersive X-ray spectroscopy (SEM-EDX) surface elemental mapping. The analytical performance of the LIBS system has been evaluated through the correlation of the LIBS determined concentrations of Mn with its certified values. The results are found to be in very good agreement with the certified concentrations.

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Improved LIBS limit of detection of Be, Mg, Si, Mn, Fe and Cu in aluminum alloy samples using a portable Echelle spectrometer with ICCD camera

Cited by 138 publications

References 24 publications

Assessment of the concentration of Cr, Mn and Fe in sediment using laser-induced breakdown spectroscopy

Assessment of the concentration of Cr, Mn and Fe in sediment using laser-induced breakdown spectroscopy

Damage Profile of HDPE Polymer using Laser-Induced Plasma

Homogeneity testing and quantitative analysis of manganese (Mn) in vitrified Mn-doped glasses by laser-induced breakdown spectroscopy (LIBS)

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