Self-absorption effect in calibration-free laser-induced breakdown spectroscopy: Analysis of mineral profile in Maerua oblongifolia plant

Qasim, Muhammad; Anwar‐ul‐Haq, Muhammad; Shah, Aamir Hassan; Afgan, Muhammad Sher; Haq, Sami Ul; Khan, Rameez Abbas; Baig, M. A.

doi:10.1016/j.microc.2021.107106

Cited by 14 publications

(11 citation statements)

References 41 publications

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“…Whereas in our previous work on the quantitative analysis of standard Al alloy sample was performed using the CF-LIBS technique, the results were validated with the certified values of the reference standard material (SRM) which are in good agreement as reported by Shakeel et al [29]. Recently, one of the co-author, Qasim et al [45], applied CF-LIBS and ICP-MS techniques to quantitatively analyze the mineral profile in the Maerua oblongifolia plant, and the results are in close agreement.…”

Section: Quantitative Analysis Using Calibration-free Libssupporting

confidence: 76%

Analysis of Carbon Contents and Heavy Metals in Coal Samples Using Calibration-free LIBS Technique

Israr

Abbas

Haq

et al. 2022

Journal of Spectroscopy

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We report a compositional analysis of four coal samples collected from different mines in Pakistan and one Chinese brand. The coal samples were pelletized in the form of a disc and irradiated with a focused laser beam of fundamental (1064 nm) and second (532 nm) harmonics of Nd:YAG laser, which produced plasma on the sample surface. The plasma emissions were recorded using a broadband (200–800 nm), high-resolution spectrometer (LIBS2500plus, Ocean Optics Inc., USA), which shows that the emission spectra from 532 nm, were more intense and dense in comparison with 1064 nm spectra. The compositional analysis of coal samples was performed using the calibration-free LIBS technique, utilizing the plasma temperature and self-absorption corrected emission line intensities. The analysis yields a number of major and trace elements in coal samples, among which the concentration of carbon varies from 642 to 718 g/kg, and sulfur contents were detected as 1.1 to 7.2 g/kg. The heavy metals chromium and lead were detected in the range of 14 to153 and 210 to 252 ppm, respectively. In addition, the gross calorific value (GCV) of all the coal samples was estimated using the concentrations of carbon, hydrogen, nitrogen, oxygen, and sulfur from 26.40 to 27.18 MJ/kg, which is an important parameter to determine the coal quality and burning efficiency.

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Section: Quantitative Analysis Using Calibration-free Libssupporting

confidence: 76%

Analysis of Carbon Contents and Heavy Metals in Coal Samples Using Calibration-free LIBS Technique

Israr

Abbas

Haq

et al. 2022

Journal of Spectroscopy

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“…Where, Δ λ is the FWHM of the Lorentzian component of the selected spectral line affected by the self-absorption,

is the true value of FWHM of the same line, when it is not affected by the self-absorption effect and α is taken as −0.54 [22] , [36] . The Stark broadening is the main broadening mechanism in LIBS, that correlates

with the electron number density

and Stark broadening parameter ω , as given in equation (7) .…”

Section: Resultsmentioning

confidence: 99%

“…The accuracy of plasma temperature is affected by the presence of self-absorption, which subsequently reduces the accuracy of quantitative results [20] , [21] . Several methods have been reported in the literature to evaluate and correct self-absorption in the emission lines [22] , [23] . Sun et al proposed an internal reference method for self-absorption correction (IRSAC), in which an internal reference line, free from self-absorption was used to correct the spectral intensities of other self-absorbed emission lines.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic and crystallographic analysis of nephrite jade gemstone using laser induced breakdown spectroscopy, Raman spectroscopy, and X-ray diffraction

Khan

Haq

Qasim

et al. 2022

Heliyon

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“…The LIBS experimental setup used to investigate the compositional analysis of the sample has been explained elsewhere [7][8][9][10][11]. A schematic diagram of the LIBS arrangement used for the study of the AlGaAs sample is shown in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

“…During the last few decades, various techniques, including atomic absorption spectroscopy (AAS) [1,2], inductively coupled plasma optical emission spectroscopy (ICP-OES) [3], inductively coupled plasma mass spectroscopy (ICP-MS) [4], and X-ray fluorescence [5], have been utilized for the quantitative analysis of the material. Of all these techniques, laser-induced breakdown spectroscopy (LIBS) has been proven to be an emerging, simple, well-established, robust, reliable, and cost-effective technique for elemental analysis [6][7][8][9][10][11]. The LIBS technique has many potential applications in the field of geology [12,13], industry [14], medical [15], and environmental studies [16].…”

Section: Introductionmentioning

confidence: 99%

Quantification of Aluminum Gallium Arsenide (AlGaAs) Wafer Plasma Using Calibration-Free Laser-Induced Breakdown Spectroscopy (CF-LIBS)

et al. 2022

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In this work, we report the results of the compositional analysis of an aluminum gallium arsenide (AlGaAs) sample using the calibration-free laser-induced breakdown spectroscopy (CF-LIBS) technique. The AlGaAs sample was doped with three various concentrations of gallium (Ga), arsenic (As), and aluminum (Al), as reported by the manufacturer, and the CF-LIBS technique was employed to identify the doping concentration. A pulsed Q-switched Nd: YAG laser capable of delivering 200 and 400 mJ energy at 532 and 1064 nm, respectively, was focused on the target sample for ablation, and the resulting emission spectra were captured using a LIBS 2000+ spectrometer covering the spectral range from 200 to 720 nm. The emission spectra of the AlGaAs sample yielded spectral lines of Ga, As, and Al. These lines were further used to calculate the plasma parameters, including electron temperature and electron number density. The Boltzmann plot method was used to calculate the electron temperature, and the average electron temperature was found to be 5744 ± 500 K. Furthermore, the electron number density was calculated from the Stark-broadened line profile method, and the average number density was calculated to be 6.5 × 1017 cm−3. It is further observed that the plasma parameters including electron temperature and electron number density have an increasing trend with laser irradiance and a decreasing trend along the plume length up to 2 mm. Finally, the elemental concentrations in terms of weight percentage using the CF-LIBS method were calculated to be Ga: 94%, Al: 4.77% and As: 1.23% for sample-1; Ga: 95.63%, Al: 1.15% and As: 3.22% for sample-2; and Ga: 97.32%, Al: 0.69% and As: 1.99% for sample-3. The certified concentrations were Ga: 95%, Al: 3% and As: 2% for sample-1; Ga: 96.05%, Al: 1% and As: 2.95% for sample-2; and Ga: 97.32%, Al: 0.69% and As: 1.99% for sample-3. The concentrations measured by CF-LIBS showed good agreement with the certified values reported by the manufacturer. These findings suggest that the CF-LIBS technique opens up an avenue for the industrial application of LIBS, where quantitative/qualitative analysis of the material is highly desirable.

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Self-absorption effect in calibration-free laser-induced breakdown spectroscopy: Analysis of mineral profile in Maerua oblongifolia plant

Cited by 14 publications

References 41 publications

Analysis of Carbon Contents and Heavy Metals in Coal Samples Using Calibration-free LIBS Technique

Analysis of Carbon Contents and Heavy Metals in Coal Samples Using Calibration-free LIBS Technique

Spectroscopic and crystallographic analysis of nephrite jade gemstone using laser induced breakdown spectroscopy, Raman spectroscopy, and X-ray diffraction

Quantification of Aluminum Gallium Arsenide (AlGaAs) Wafer Plasma Using Calibration-Free Laser-Induced Breakdown Spectroscopy (CF-LIBS)

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