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Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown
Published on: February 14, 2014
Absolute analysis of particulate materials by laser-induced breakdown spectroscopy
1Department of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel.
Analytical Chemistry
|June 7, 2011
Summary
A new Laser-induced breakdown spectroscopy (LIBS) method provides absolute elemental concentrations in dust and soil. This approach overcomes signal instability and improves detection limits for particulate materials analysis.
Area of Science:
- Analytical Chemistry
- Spectroscopy
- Materials Science
Background:
- Laser-induced breakdown spectroscopy (LIBS) is used for elemental analysis.
- Traditional LIBS calibration requires a constant constituent, limiting its application for particulate materials.
- Signal instability is a major challenge in LIBS analysis of dusts and soils.
Purpose of the Study:
- To develop a novel data acquisition and analysis approach for LIBS.
- To enable absolute elemental concentration measurements in particulate materials.
- To overcome the limitations of traditional calibration methods and improve signal stability.
Main Methods:
- Utilized a sequence of signals from single breakdown events instead of integrated acquisition.
- Developed an intrinsic compensation method for pulse-to-pulse fluctuations.
- Implemented a data-filtering process to eliminate ill-conditioned spectra.
Main Results:
- Achieved absolute elemental concentrations without requiring a constant constituent.
- Demonstrated improved signal stability for particulate materials analysis.
- Obtained extended linear calibration curves and improved detection limits by one order of magnitude.
Conclusions:
- The new LIBS approach provides accurate absolute concentrations for particulate materials.
- The method effectively compensates for signal instability inherent in LIBS.
- Enhanced detection limits significantly advance the analytical capabilities for environmental and industrial samples.
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