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Updated: May 8, 2026

Quantitative Analysis of Vacuum Induction Melting by Laser-induced Breakdown Spectroscopy
Published on: June 10, 2019
Accuracy improvement of quantitative analysis by spatial confinement in laser-induced breakdown spectroscopy
1Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.
Spatial confinement of laser-induced breakdown spectroscopy (LIBS) plasma using a cavity significantly enhances the accuracy of quantitative analysis for low-concentration elements in steel. This method improves emission intensity and correlation coefficients for elements like vanadium, chromium, and manganese.
Area of Science:
- Analytical Chemistry
- Spectroscopy
- Materials Science
Background:
- Quantitative analysis in laser-induced breakdown spectroscopy (LIBS) faces challenges with low-concentration elements.
- Improving the accuracy of elemental analysis in steel is crucial for material quality control.
Purpose of the Study:
- To enhance the accuracy of quantitative analysis in LIBS by spatially confining the plasma.
- To investigate the effect of cavity confinement on the emission intensity and quantitative accuracy of low-concentration elements in steel.
Main Methods:
- Utilized a Nd:YAG laser to generate plasma from steel targets.
- Employed a hemispherical cavity to confine the laser-induced plasma.
- Optimized cavity dimensions and laser fluence for enhanced spectral analysis.
- Analyzed emission intensities and correlation coefficients for vanadium, chromium, and manganese.
Main Results:
- Achieved significant enhancement factors for V (4.2), Cr (3.1), and Mn (2.87) emission intensities.
- Increased correlation coefficients for quantitative analysis of V, Cr, and Mn against iron.
- Demonstrated improved plasma uniformity due to spatial confinement.
Conclusions:
- Spatial confinement of LIBS plasma using a cavity effectively improves the accuracy of quantitative analysis for low-concentration elements in steel.
- The optimized cavity and laser parameters lead to enhanced spectral line intensities and better analytical correlations.
- This approach offers a novel method for advancing quantitative LIBS analysis.
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