&lt;title&gt;Influence of self-absorption on the performance of laser-induced breakdown spectroscopy (LIBS)&lt;/title&gt;

Player, M.A.; Watson, John; Freitas, Jolyon M. O. De

doi:10.1117/12.397959

Cited by 3 publications

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“…The theoretical COG correlates the spectral intensity with the optical depth and can well describe the line intensity saturation caused by self-absorption. Power-law calibration curve based on the COG theory can represent the boundary between power-law and linear domains in quantitative LIBS analysis, and has a square-root dependence at high concentrations [42].…”

Section: Curve-of-growthmentioning

confidence: 99%

Mechanisms and efficient elimination approaches of self-absorption in LIBS

Hou

Zhang

2019

Plasma Sci. Technol.

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Laser-induced breakdown spectroscopy (LIBS) is a promising analytical spectroscopy technology based on spectroscopic analysis of the radiation emitted by laser-produced plasma. However, for quantitative analysis by LIBS, the so-called self-absorption effects on the spectral lines, which affect plasma characteristics, emission line shapes, calibration curves, etc, can no longer be neglected. Hence, understanding and determining the self-absorption effects are of utmost importance to LIBS research. The purpose of this review is to provide a global overview of self-absorption in LIBS on the issues of experimental observations and adverse effects, physical mechanisms, correction or elimination approaches, and utilizations in the past century. We believe that better understanding and effective solving the self-absorption effect will further enhance the development and maturity of LIBS.

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Section: Curve-of-growthmentioning

confidence: 99%

Mechanisms and efficient elimination approaches of self-absorption in LIBS

Hou

Zhang

2019

Plasma Sci. Technol.

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“…The measurements were repeated on three different spots of the sample for checking its homogeneity and then averaged for improving the signalto-noise ratio. The LIBS signal was collected, as in the standard version of Modì [4], using an optical fiber placed at 45°, 2 cm from the sample surface.…”

Section: Experimental Approachmentioning

confidence: 99%

“…the normalization of the LIBS signal of the elements of interest with the same spectral signal produced by an element of know concentration in the sample (in general the major matrix element). In the case of steel analysis, being iron the major matrix element, the choice of the spectral line for normalization is not trivial, because of the strong selfabsorption which affects most of the measurable iron lines in the spectrum [4]. Moreover, for the application of the internal standard method the iron concentration must be known or, if not available, it must be estimated.…”

Section: Introductionmentioning

confidence: 99%

Fast analysis of complex metallic alloys by double-pulse time-integrated Laser-Induced Breakdown Spectroscopy

Sorrentino

Carelli

Francesconi

et al. 2009

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…However, the photons spontaneously emitted by the species in the plasma core may be absorbed by similar species with lower energy levels in the moving path, resulting in the so-called 'self-absorption effect'. This effect will alter the measured intensities and linewidths of spectral lines, distort the calibration curve, and deteriorate the quantitative analysis results [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Development of miniaturized SAF-LIBS with high repetition rate acousto-optic gating for quantitative analysis

Chen¹,

Hou²,

Wang³

et al. 2022

Plasma Sci. Technol.

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The self-absorption effect in laser-induced breakdown spectroscopy (LIBS) reduces the accuracy of quantitative measurement results. The self-absorption-free LIBS (SAF-LIBS) has been proved to directly capture the optically thin plasma spectra by setting an appropriate exposure time. In this paper, a novel SAF-LIBS technique with high repetition rate acousto-optic gating is developed, in which an AOM is used as the shutter to diffract the optically thin fluorescence, and a high repetition rate laser is used to produce quasi-continuous plasmas to enhance the integral spectral intensity, so that the CCD spectrometer can replace an intensified CCD (ICCD) and echelle spectrometer in SAF-LIBS. Experimental results show that the average absolute prediction error of aluminum is reduced to 0.18%, which is equivalent to that of traditional SAF-LIBS. This technique not only effectively shields continuous background radiation and broadened spectral lines in optically thick plasma, but also has advantages of miniaturization, low cost, convenience and reliability.

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<title>Influence of self-absorption on the performance of laser-induced breakdown spectroscopy (LIBS)</title>

Cited by 3 publications

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Mechanisms and efficient elimination approaches of self-absorption in LIBS

Mechanisms and efficient elimination approaches of self-absorption in LIBS

Fast analysis of complex metallic alloys by double-pulse time-integrated Laser-Induced Breakdown Spectroscopy

Development of miniaturized SAF-LIBS with high repetition rate acousto-optic gating for quantitative analysis

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