Spectral analysis of Qinling Mountain rock using laser induced breakdown spectroscopy

Luo, Wei; Zhao, Xue; Zhu, Hai; Xie, Dangyuan; Liu, J.; Jin, Pei

doi:10.1080/09500340.2013.865803

Cited by 9 publications

(3 citation statements)

References 15 publications

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“…Because the uncertainty of the electronic transition of the spectral lines, there are errors in calculating the plasma temperature. In order to correct the plasma temperature, the iterative Boltzmann plot method was used to calculate the plasma temperature [29,30,31]. Figures 6 and 7 show delay time and laser energy dependence of the average plasma temperature within the gate width from the low-and high-resolution spectra, respectively.…”

Section: Analysis Of Plasma Statementioning

confidence: 99%

Resolution effects on spectral analysis of low alloy steel by laser-induced breakdown spectroscopy

Shen¹,

Chen²,

Luo³

et al. 2023

J. Phys. D: Appl. Phys.

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The influence of resolution on spectral analysis is of great significance to improve the measurement accuracy of laser-induced breakdown spectroscopy (LIBS). In this study, the low alloy steel samples were measured at different resolutions using dual-channel spectrometer simultaneously to discuss the plasma characteristics. The diffraction efficiency of the grating was different at different resolutions, which led to different spectral intensities measured at different resolutions. It affected the LIBS spectral analysis. For plasma spectral analysis, the experimental results showed that the Boltzmann plot method was suitable for calculating the plasma temperature using the low-resolution spectra with 0.076 nm/pixel. Based on the high-resolution spectra with 0.01 nm/pixel, Boltzmann double lines method was applied to calculate the plasma temperature, and the analysis line was IFeI395.668/IFeI400.524. Due to the influence of instrument broadening, Stark broadening could only be used to characterize the electron density using the high-resolution spectra. For quantitative analysis in LIBS spectral analysis, support vector machine regression (SVR) with different inputs was used to quantitatively analyse the Mn content in the low alloy steel. The prediction accuracy of the low-resolution spectra was poor compared to the high-resolution spectra. When the input was the target spectral intensities and the plasma state, the fitting accuracy and prediction accuracy were improved. It showed that SVR combined with the plasma state was an effective method to improve the accuracy of LIBS quantitative analysis of Mn content in low alloy steel.

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Section: Analysis Of Plasma Statementioning

confidence: 99%

Resolution effects on spectral analysis of low alloy steel by laser-induced breakdown spectroscopy

Shen¹,

Chen²,

Luo³

et al. 2023

J. Phys. D: Appl. Phys.

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“…The neutral Ca line at 422.67 nm was selected for the determination of electron number density. Several studies report the electron number density, extracted using this emission line of calcium [42][43][44][45]. The self-absorption effect can influence the accuracy of results.…”

Section: Determination Of Plasma Parametersmentioning

confidence: 99%

Quantitative analysis of saindha salt using laser induced breakdown spectroscopy and cross-validation with ICP-MS

Qasim

Haq

Afgan

et al. 2020

Plasma Sci. Technol.

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Saindha salt is considered to be more advantageous than the other edible salts for the patients suffering from diabetes, blood pressure and kidney diseases. To explore the constituent elements of this salt, laser induced breakdown spectroscopy (LIBS) has been exploited for its qualitative and quantitative analysis. The third harmonic (355 nm) of a Q-switched Nd:YAG laser has been used to produce the saindha salt plasma and the time integrated optical emission spectra were registered using a set of six miniature spectrometers covering the spectral range of 230-805 nm. The spectroscopic analysis of the emission spectra predominately revealed numerous neutral or singly ionized emission lines of Ca, Mg, Na, K, Fe, Sr, Si, Li and Al. The laser produced plasma was characterized by calculating the electron temperature from the Boltzmann plots and the electron number density from the Stark broadened line profile as a function of laser irradiance and distance from the target sample. The relative concentration of the constituent elements was extracted by the integrated line intensities of the strongest spectral line of each element using the self-calibration-LIBS (SC-LIBS) and one-line calibration free-LIBS (OLCF-LIBS) methods. For cross-validation, the LIBS results have been compared with that obtained from the inductively coupled plasma-mass spectroscopy (ICP-MS) showing good agreement.

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“…As a kind of emission spectroscopy, laser-induced breakdown spectroscopy (LIBS) technology has been widely investigated and developed for variety of applications thanks to its unique and attractive features [1,2]. Whilst qualitative and quantitative compositional analysis of geological [3], archaeological [4] and industrial [5] materials have taken the principal part in LIBS application, many other industrial applications witnessed quick progress.…”

Section: Introductionmentioning

confidence: 99%

Investigation of compositional analysis and physical properties for Ni-Cr-Nb alloys using laser-induced breakdown spectroscopy

Salloom¹,

Hamad²

2021

Optica Applicata

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In this work, laser-induced breakdown spectroscopy (LIBS) analysis is optimized for direct estimation of elemental composition, thermal conductivity and hardness for Ni-Cr-Nb alloys. These alloys were chosen with a variable elemental content of niobium and chromium. The influence of laser energy and shot numbers on measuring line intensity was investigated. Based on the ratio between two spectral lines, calibration curves were formed to estimate the element concentration and LIBS results were confirmed with related energy-dispersive X-ray spectroscopy (EDS) data. Hardness and thermal conductivity estimation using LIBS were done by measuring the ratio between two spectral lines, plasma excitation temperature and electron density for different samples. Semi-empirical formulas correlated hardness and thermal conductivity with plasma temperature were established.

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Spectral analysis of Qinling Mountain rock using laser induced breakdown spectroscopy

Cited by 9 publications

References 15 publications

Resolution effects on spectral analysis of low alloy steel by laser-induced breakdown spectroscopy

Resolution effects on spectral analysis of low alloy steel by laser-induced breakdown spectroscopy

Quantitative analysis of saindha salt using laser induced breakdown spectroscopy and cross-validation with ICP-MS

Investigation of compositional analysis and physical properties for Ni-Cr-Nb alloys using laser-induced breakdown spectroscopy

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