Effect of Optimum Parameters Setting on Laser-Induced Breakdown Spectroscopy

Kadachi, Ahmed N.; Al-Eshaikh, Mohammad A.

doi:10.1080/00387010.2014.895387

Cited by 9 publications

(10 citation statements)

References 32 publications

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“…The LIBS on a set of metal alloy reference standards was performed on a Spectrolaser-7000 (Laser Analysis Technologies Australia) that was described in detail in our previous investigation [19]. A schematic representation of the instrument is shown in figure 1.…”

Section: Methodsmentioning

confidence: 99%

“…The sample material chosen for this investigation was a set of reference standards of metal alloys (Al, Ni, Zn, Sn, and Pb) from the Brammer Standard. The first step of this invest igation was the setting up of the LIBS system with the optimum parameters such as pulse energy, the lens-to-sample surface distance, and the delay time as demonstrated in our previous work [19]. After that, 15 spectra were acquired at 5 different locations on the surface of each reference standard sample at the rate of 3 shots in each location.…”

Section: Methodsmentioning

confidence: 99%

“…Several approaches have been developed to compensate for signal fluctuation and matrix effects based on different techniques of normalization and correction procedure centered on plasma characteristics and optimization of experimental parameters [16][17][18][19]. Most of the SA correction (SAC) methods proposed in recent years were primarily intended for Laser Physics Self-absorption correction: an effective approach for precise quantitative analysis with laser induced breakdown spectroscopy plasma diagnoses, correction of estimated temper atures, and electron density [20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

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Self-absorption correction: an effective approach for precise quantitative analysis with laser induced breakdown spectroscopy

2018

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The light emitted from plasma created by the interaction of a laser beam with the sample surface is always subject to self-absorption (SA) from its cold outer region. This phenomenon affects the precision and the uncertainty of the quantitative analysis by laser-induced breakdown spectroscopy. To overcome this inherent flaw of spectroscopy, different methods of SA corrections (SACs) have been proposed. In this work laser induced breakdown spectroscopy was performed on a set of metal alloys of reference standard samples and the respective quantitative calibration curves were plotted. The SAC was performed by adopting a method based on the ratio of electron density calculated from Stark broadening of the absorbed line and non-absorbed one emitted by the low concentration element present in the air atmosphere. The quality of the linear relationship between the normalized spectral line intensity and analytic concentration was estimated by the coefficient of determination and the quality coefficient of the regression lines. The validation of this procedure by the measurement of two new standards confirms the improvement of the quantitative analysis using the SAC especially for the single ionized emitted line in laser induced breakdown spectroscopy.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Self-absorption correction: an effective approach for precise quantitative analysis with laser induced breakdown spectroscopy

2018

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“…Laser induced plasma is mainly influenced by the pulse duration of laser light, whereas plasma formation time is microseconds [11][12][13][14][15]. In this work, we have used Nd:YAG laser, which has a nanosecond pulse duration.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, we have used Nd:YAG laser, which has a nanosecond pulse duration. The pulse duration further interacts with plasma plume, which is known as laser plasma interaction [14][15]. Laser plasma interaction gives the absorbance of laser light into the plasma plume.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic Characterization of Laser Ablated Germanium Plasma

Ashraf

Shaikh²,

Zehra³

et al. 2021

Pak J Anal Environ Chem

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In the present study, the germanium (Ge) sample has been studied by laser induced breakdown spectroscopy which leads to the formation of plasma plume in the air. This research work comprises on pure Ge sample, and it has been studied using laser irradiance 1.831011 watt.cm-2 and Q-Switched Nd:YAG laser pulse (λ ~ 1064 nm wavelength and  ~ 5 ns pulse width). The spatially resolved plasma plume parameters are investigated, such as variation of electron temperature Te and electron number density ne as a function of detector position. These parameters show variation in the plasma plume and yield electron temperature Te from 12340 to 7640 ± 1200 K. Whereas electron number density ne varies from 3.61017 to 1.601017 cm-3 with the change in detector position is moving away from plasma plume from 0 to 3 mm. The results show that electron temperature Te and electron number density ne are estimated from the Boltzmann plot method and by using Lorentzian function at spectral line using FWHM full width at half maximum at 265.11 nm (4p5s 3 p2 → 4p 2 3 p2) wavelength of Ge (I) line, respectively.

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