Preliminary evaluation of laser induced breakdown spectroscopy for slurry samples

Oh, Seung-Min; Yueh, Fang‐Yu; Singh, Jagdish P.; Herman, C.C.; Zeigler, Kristine E.

doi:10.1016/j.sab.2008.10.023

Cited by 33 publications

(12 citation statements)

References 18 publications

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“…In data processing, one of the common methods for reducing the uncertainty is normalizing the data with the whole spectrum area [9][10][11][12], which can partially reduce the signal uncertainty resulted from fluctuations of laser energy, delay time, and gate time etc. [10].…”

Section: Introductionmentioning

confidence: 99%

A spectrum standardization approach for laser-induced breakdown spectroscopy measurements

Wang

Liu

West

et al. 2012

Spectrochimica Acta Part B: Atomic Spectroscopy

109

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This paper presents a spectra normalization method for laser-induced breakdown spectroscopy (LIBS) measurements by converting the recorded characteristic line intensity at varying conditions to the intensity under a standard condition with standard plasma temperature, degree of ionization, and total number density of the interested species to reduce the measurement uncertainty. The characteristic line intensities of the interested species are first converted to the intensity at a fixed temperature and standard degree of ionization but varying total number density for each laser pulse analysis. Under this state, if the influence of the variation of plasma morphology is neglected, the sum of multiple spectral line intensities for the measured element can be regarded proportional to the total number density of the specific element, and the fluctuation of the total number density, or the variation of ablation mass, was compensated for by the application of this relationship. In the experiments with 29 brass alloy samples, the application of this method to determine Cu concentration shows a significant improvement over generally applied normalization method for measurement precision and accuracy. The average RSD value, average value of the error bar, R 2 , RMSEP, and average value of the maximum relative error were: 5.29%, 0.68%, 0.98, 2.72%, 16.97%, respectively, while the above parameter values for normalization with the whole spectrum area were: 8.61%, 1.37%, 0.95, 3.28%, 29.19%, respectively.

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Section: Introductionmentioning

confidence: 99%

A spectrum standardization approach for laser-induced breakdown spectroscopy measurements

Wang

Liu

West

et al. 2012

Spectrochimica Acta Part B: Atomic Spectroscopy

109

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show abstract

“…The resonance lines, Sr(I) 496.23 and Sr(I) 650.4 nm, have two slopes for lower and higher concentrations depending on their optical depths. The normalization technique 26,27 reduces the effects of the matrix and improve the calibration models. This method can help to identify saturation and SA effects.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Optical Depths and Self-Absorption of Strontium and Aluminum Emission Lines in Laser-Induced Breakdown Spectroscopy (LIBS)

et al. 2017

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Laser-induced breakdown spectroscopy (LIBS) is a widely used laser spectroscopic technique in various fields, such as material science, forensic science, biological science, and the chemical and pharmaceutical industries. In most LIBS work, the analysis is performed using radiative transitions from atomic emissions. In this study, the plasma temperature and the product [Formula: see text] (the number density N and the absorption path length [Formula: see text]) were determined to evaluate the optical depths and the self-absorption of Sr and Al lines. A binary mixture of strontium nitrate and aluminum oxide was used as a sample, consisting of variety of different concentrations in powder form. Laser-induced breakdown spectroscopy spectra were collected by varying various parameters, such as laser energy, gate delay time, and gate width time to optimize the LIBS signals. Atomic emission from Sr and Al lines, as observed in the LIBS spectra of different sample compositions, was used to characterize the laser induced plasma and evaluate the optical depths and self-absorption of LIBS.

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“…An interesting study by Oh et al investigated the use of LIBS for slurry samples used in the vitrification process of liquid radioactive wastes. 255 Two different systems were used; one of which employed a Czerny-Turner monochromator coupled with an intensified diode array detector (IDAD) whereas the other employed an echelle spectrometer with an intensified charge coupled device. The echelle system gave a high efficiency, simultaneous multi-element detection capability but, although the Czerny-Turner system worked, it required signal normalization to the entire plasma emission area in order to improve the precision.…”

Section: Other Techniquesmentioning

confidence: 99%

Atomic spectrometry update. Industrial analysis: metals, chemicals and advanced materials

Carter¹,

Fisher²,

Goodall³

et al. 2009

J. Anal. At. Spectrom.

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Preliminary evaluation of laser induced breakdown spectroscopy for slurry samples

Cited by 33 publications

References 18 publications

A spectrum standardization approach for laser-induced breakdown spectroscopy measurements

A spectrum standardization approach for laser-induced breakdown spectroscopy measurements

Evaluation of Optical Depths and Self-Absorption of Strontium and Aluminum Emission Lines in Laser-Induced Breakdown Spectroscopy (LIBS)

Atomic spectrometry update. Industrial analysis: metals, chemicals and advanced materials

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