Calibration-free laser-induced breakdown spectroscopy for quantitative elemental analysis of materials

Unnikrishnan, V. K.; Mridul, K; Nayak, Rajesh; Alti, Kamlesh; Kartha, V. B.; Chidangil, Santhosh; Gupta, Gaurav; Suri, B. M.

doi:10.1007/s12043-012-0298-1

Cited by 53 publications

(22 citation statements)

References 23 publications

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“…The samples were exposed to air with a pressure very close to 1 atm. The optimum laser energy and delay time were found to be 100 mJ/pulse and 2 μs, respectively [66].…”

Section: Validation Of the Cf-libs Algorithmmentioning

confidence: 99%

Determination of a brass alloy concentration composition using calibration-free laser-induced breakdown spectroscopy

et al. 2015

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Laser-induced breakdown spectroscopy (LIBS) is a technique that can provide qualitative and quantitative measurements of the сharacteristics of irradiated metals. In the present work, we have calculated the parameters of the plasma produced from a brass alloy sample under the action of a pulsed Nd : YAG laser operating at 1064 nm. The emission lines of copper atoms (Cu I), zinc atoms (Zn I), and lead atoms (Pb I), which are elements of a brass alloy composition, were used to investigate the parameters of the brass plasma. The spectral profiles of Cu, Zn, and Pb lines have been used to extract the electron temperature and density of the brass alloy plasma. The characteristics of Cu, Zn, and Pb were determined quantatively by the calibration-free LIBS (CF-LIBS) method considering for accurate analysis that the laser-induced ablated plasma is optically thin in local thermodynamic equilibrium conditions and the plasma ablation is stoichiometric. The Boltzmann plot method was used to evaluate the plasma temperature, and the Stark broadened profiles were used to determine the electron density. An algorithm based on the experimentally measured values of the intensity of spectral lines and the basic laws of plasma physics was developed for the determination of Cu, Zn, and Pb concentrations in the brass sample. The concentrations calculated by CF-LIBS and the certified concentrations were very close.

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“…The samples were exposed to air with a pressure very close to 1 atm. The optimum laser energy and delay time were found to be 100 mJ/pulse and 2 μs, respectively [66].…”

Section: Validation Of the Cf-libs Algorithmmentioning

confidence: 99%

Determination of a brass alloy concentration composition using calibration-free laser-induced breakdown spectroscopy

et al. 2015

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“…The sum of ionized and neutral species gives the total concentration of an element as per Eq. (7) [33] (Fig. 7)…”

Section: P Tmentioning

confidence: 99%

Use of laser-induced break spectroscopy for the determination of major and trace elements in Zanthoxylum armatum

Shahida¹,

Khan

Azad³

et al. 2020

emergent mater.

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Zanthoxylum armatum (ZA) is a medicinal plant (MP) that is widely distributed in hilly and moist areas and has a different medical effect on human curative functions. Laser-induced breakdown spectroscopy (LIBS) was employed as a simple, easy, and accurate method to analyze the elemental profile of Zanthoxylum armatum (ZA) (timur). Various elements present in different parts of ZA were identified including sodium, magnesium, calcium, potassium, titanium, iron, barium, aluminum, lithium, and silicon. The proposed method accuracy was found to be comparable with high technical complicated lab equipment The concentrations of these elements were determined and were found to be below the toxic level.

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“…The simplicity, rapidness and the no necessity for sample preparation in LIBS, as a well-known spectrochemical analytical technique [1,2], made it practical and attractive technique in many applications [3][4][5][6]. The data analysis for LIBS is simple and fast as long as it is used in the qualitative and semi-quantitative analysis but becomes harder and slower when the quantitative analysis is aimed.…”

Section: Introductionmentioning

confidence: 99%

Towards a Database for the Relative Spectral Lines' Intensities of Laser-Induced Breakdown spectra

Galmed

2019

Arab Journal of Nuclear Sciences and Applications

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The relative intensity is one of the parameters of the spectral lines that indicate the emission strength of such lines. The spectral lines relative intensity database for most elements has been recorded a long time ago through spectroscopic data obtained by arc, spark, and vacuum tube. The problem is that relative line intensity is source dependent and the current database cannot be used for Laser-Induced Breakdown Spectroscopy (LIBS). Since LIBS is dealing with transient plasma, then several parameters should be studied in order to find suitable conditions and a suitable way to record this database. In this work, the author is trying to find a way to construct a database for relative lines intensities that can be used properly in LIBS analysis. The LIBS spectral lines have been recorded for different delay times for different copper alloy samples. Then, some chosen copper' spectral lines were compared. An empirical formula has been proposed to calculate the spectral line intensity for each delay time. It was found that for delay times between 1000 and 2000 ns, the spectral lines were related together in a way that the copper concentration doesn't affect the spectral line relative intensity, but it only affects the value of the spectral line intensity.

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Calibration-free laser-induced breakdown spectroscopy for quantitative elemental analysis of materials

Cited by 53 publications

References 23 publications

Determination of a brass alloy concentration composition using calibration-free laser-induced breakdown spectroscopy

Determination of a brass alloy concentration composition using calibration-free laser-induced breakdown spectroscopy

Use of laser-induced break spectroscopy for the determination of major and trace elements in Zanthoxylum armatum

Towards a Database for the Relative Spectral Lines' Intensities of Laser-Induced Breakdown spectra

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