Calibration-free laser-induced plasma analysis of a metallic alloy with self-absorption correction

Shirvani-Mahdavi, Hamidreza; Shoursheini, Seyede Zahra; Gholami, Hamid; Dini-Torkamani, Ziba; Ghahari-Korani, Sare

doi:10.1007/s00340-014-5893-z

Cited by 16 publications

(8 citation statements)

References 27 publications

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“…Therefore, it is appropriate that the line integral spectral photon flux (ISPF) is henceforth considered rather than SPF in all quantitative analyses related to LIBS experiments. In the laser-generated plasma by ignoring self-absorption effect, the integral signal (ISPF) relevant to one of emission spectral lines of a neutral (i I = ) or ionized ( = … i II, III, ) atom of the analyte (element) A, S A i , can be expressed as [14] ( ) ( )…”

Section: Theoretical Foundationsmentioning

confidence: 99%

Quantitative analysis of soil calcium by laser-induced breakdown spectroscopy using addition and addition-internal standardizations

Shirvani-Mahdavi

Shafiee

2016

Meas. Sci. Technol.

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Matrix mismatching in the quantitative analysis of materials through calibration-based laser-induced breakdown spectroscopy (LIBS) is a serious problem. In this paper, to overcome the matrix mismatching, two distinct approaches named addition standardization (AS) and addition-internal combinatorial standardization (A-ICS) are demonstrated for LIBS experiments. Furthermore, in order to examine the efficiency of these methods, the concentration of calcium in ordinary garden soil without any fertilizer is individually measured by each of the two procedures. To achieve this purpose, ten standard samples with different concentrations of calcium (as the analyte) and copper (as the internal standard) are prepared in the form of cylindrical tablets, so that the soil plays the role of the matrix in all of them. The measurements indicate that the relative error of concentration compared to a certified value derived by induced coupled plasma optical emission spectroscopy is 3.97% and 2.23% for AS and A-ICS methods, respectively. Furthermore, calculations related to standard deviation indicates that A-ICS method may be more accurate than AS one.

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Section: Theoretical Foundationsmentioning

confidence: 99%

Quantitative analysis of soil calcium by laser-induced breakdown spectroscopy using addition and addition-internal standardizations

Shirvani-Mahdavi

Shafiee

2016

Meas. Sci. Technol.

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“…Models continue to be improved and progressively more variables are being added to improve comparisons with the experimental results. Shirvani-Mahdavi et al 30 further developed the concept of calibration free LIBS by addressing the complex phenomena involved in the formation of a laser initiated plasma. A peak-intensity-based model was applied to an alloy of Au, Cu and Ag to calculate the self-absorption coefficients for each element.…”

Section: Non-ferrous Metalsmentioning

confidence: 99%

“…In the GD-MS investigation, 185 particular attention was paid to possible spectral interferences (e.g. 30 Si 1 H + or 14 N 16 O 1 H + on 31 P). The maximum discharge pulse aer-peak was chosen as the optimum region for the measurement of 31 P to minimize such effects.…”

Section: Semiconductor Materials and Devicesmentioning

confidence: 99%

“…Calibration for the XANES was accomplished by pressing pellets of plastic, methyl cellulose binder and lead chromate and/or chromium acetylacetonate. The last two components could have their proportions changed to obtain 0, 5,10,15,20,25,30,50,75,90,95 and 100% Cr VI . The absorption of the pre-edge peak of Cr K-edge XANES spectra were summed and normalized and yielded straight calibrations, even though measurements were conducted at different beam time and beam line.…”

Section: Polymers and Compositesmentioning

confidence: 99%

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Atomic spectrometry update. Review of advances in the analysis of metals, chemicals and functional materials

Carter

Fisher

García³

et al. 2015

J. Anal. At. Spectrom.

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“…They also combined the internal reference for the self-absorption correction method and calibration-free inverse method in their work. Shirvani-Mahdavi et al [12] employed a special peak intensitybased model in CF-LIBS to determine the constituent elements of a metallic alloy (Cu, Ag and Au), this model is considered to be free from the self-absorption effect. Aguilera et al [13] applied the CF-LIBS analysis to the radial resolved spectral emission coefficient obtained by spatial deconvolution and calculated the relative abundance of Fe, Mn and Ni in a copper-based alloy.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of Composition Change in AZ31 Magnesium Alloy Using CF-LIBS After Laser Material Processing

Zhu

Cao

Zhong

et al. 2015

Plasma Sci. Technol.

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The concentration of elements in molten metal of AZ31 magnesium alloy after long pulsed Nd:YAG laser processing was quantitatively analyzed by using calibration-free laser-induced breakdown spectroscopy (CF-LIBS). The composition change in AZ31 magnesium alloy under different laser pulse width was also investigated. The experimental results showed that CF-LIBS can obtain satisfactory quantitative or semi-quantitative results for matrix or major elements, while only qualitative analysis was possible for minor or trace elements. Moreover, it is found that the chemical composition of molten metal will change after laser processing. The concentration of magnesium in molten metal is lower than that present in the base metal. The Mg loss increases with an increase of pulse width in the laser processing. This result shows that the selective vaporization of different elements is affected by the pulse width during laser processing.

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Calibration-free laser-induced plasma analysis of a metallic alloy with self-absorption correction

Cited by 16 publications

References 27 publications

Quantitative analysis of soil calcium by laser-induced breakdown spectroscopy using addition and addition-internal standardizations

Quantitative analysis of soil calcium by laser-induced breakdown spectroscopy using addition and addition-internal standardizations

Atomic spectrometry update. Review of advances in the analysis of metals, chemicals and functional materials

Quantitative Analysis of Composition Change in AZ31 Magnesium Alloy Using CF-LIBS After Laser Material Processing

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