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Updated: Jul 13, 2025
03:49
Quantitative Analysis of Vacuum Induction Melting by Laser-induced Breakdown Spectroscopy
Published on: June 10, 2019
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Compositional analysis of copper and iron-based alloys using LIBS coupled with chemometric method
Vikas Gupta1, Abhishekh Kumar Rai2, Tejmani Kumar1
1Laser Spectroscopy Research Laboratory, Department of Physics, University of Allahabad, Prayagraj, 211002, India.
Summary
Laser-induced breakdown spectroscopy (LIBS) offers efficient compositional analysis for alloys. Combining calibration-free LIBS with partial least square regression (PLSR) enables rapid, cost-effective quality assessment without sample preparation.
Area of Science:
- Analytical Chemistry
- Materials Science
- Spectroscopy
Background:
- Accurate alloy composition is critical for determining material properties in industrial applications.
- Laser-induced breakdown spectroscopy (LIBS) is a versatile technique for elemental analysis.
- Online, in-situ, and rapid analysis methods are needed for industrial quality control.
Purpose of the Study:
- To evaluate the effectiveness of calibration-free LIBS (CF-LIBS) and calibration curve methods for alloy compositional analysis.
- To optimize LIBS parameters for accurate quantitative measurements.
- To demonstrate the combined utility of CF-LIBS and partial least square regression (PLSR) for industrial quality assessment.
Main Methods:
- Utilized calibration-free LIBS (CF-LIBS) and partial least square regression (PLSR) for compositional analysis of copper and iron-based alloys.
- Optimized temporal delay for CF-LIBS to meet optically thin and local thermal equilibrium (LTE) plasma conditions.
- Selected strongest emission line regions for quantitative analysis in the PLSR method.
Main Results:
- Demonstrated the feasibility of using CF-LIBS and PLSR for quantitative elemental analysis of alloys.
- Optimized plasma conditions and spectral regions for improved analytical accuracy.
- Showcased the potential for time-resolved LIBS spectra analysis and plasma parameter variation.
Conclusions:
- CF-LIBS combined with PLSR provides a rapid and cost-effective method for alloy quality monitoring.
- The technique eliminates the need for sample pre-treatment, simplifying industrial analysis.
- LIBS is a powerful tool for online, in-situ compositional analysis of materials in various phases.
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