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08:53
Dependence of Laser-induced Breakdown Spectroscopy Results on Pulse Energies and Timing Parameters Using Soil Simulants
Published on: September 23, 2013
Parametric study of pellets for elemental analysis with laser-induced breakdown spectroscopy
Bansi Lal1, Hongbo Zheng, Fang-Yu Yueh
1Diagnostic Instrumentation and Analysis Laboratory, Mississippi State University, Starkville, Mississippi 39759, USA.
Applied Optics
|May 8, 2004
Summary
Optimizing laser-induced breakdown spectroscopy (LIBS) accuracy requires careful control of pellet preparation parameters. Binder type, pressing pressure, and focal spot position significantly impact LIBS data precision for materials analysis.
Area of Science:
- Analytical Chemistry
- Materials Science
- Spectroscopy
Background:
- Laser-Induced Breakdown Spectroscopy (LIBS) is a valuable technique for elemental analysis.
- Accurate LIBS analysis of solid samples, particularly powders pressed into pellets, is crucial for various industrial applications.
- Understanding the influence of sample preparation parameters on LIBS data quality is essential for reliable results.
Purpose of the Study:
- To investigate the impact of different parameters on the accuracy of LIBS data obtained from pelletized samples.
- To determine how binder properties, pressing pressure, and focal spot position affect the standard deviation of LIBS measurements.
- To validate the findings by creating calibration curves for key elements in relevant industrial materials.
Main Methods:
- Preparation of pellets using silica, alumina, and lime powders with various binders (polyvinyl alcohol, sucrose, starch).
- Systematic variation of binder amount and type, pressing pressure, and focal spot position during LIBS analysis.
- Generation of calibration curves for Silicon (Si), Iron (Fe), and Boron (B) using prepared pellets.
Main Results:
- The standard deviation of LIBS data is demonstrably dependent on the amount and nature of the binder used.
- Pellet pressing pressure significantly influences the precision of LIBS measurements.
- The position of the focal spot on the pellet affects the accuracy and reproducibility of the LIBS signal.
- Calibration curves for Si, Fe, and B showed the practical applicability of optimized pellet preparation.
Conclusions:
- Precise control over pellet preparation parameters is critical for enhancing the accuracy of LIBS analysis.
- Binder selection, pressing pressure, and focal spot optimization are key factors for achieving reliable quantitative elemental analysis using LIBS.
- The study provides valuable insights for improving LIBS methodology in materials characterization and waste management.
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