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In-Situ Lithium Analysis In MgLi Alloys Using Laser-Induced Breakdown Spectroscopy with a Compact Chamber.

Ivan Tanra1, Marincan Pardede2, Indra Karnadi1

  • 1Department of Electrical Engineering, Krida Wacana Christian University, Jakarta, 11470, Indonesia.

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
|May 19, 2024
PubMed
Summary
This summary is machine-generated.

This study demonstrates in-situ Lithium (Li) analysis in Magnesium-Lithium (MgLi) alloys using Laser-Induced Breakdown Spectroscopy (LIBS). Lowering pressure in a compact chamber effectively reduces spectral self-reversal, enabling accurate Li quantification.

Keywords:
LIBSLithium AnalysisResonance linesSelf reversal Effect

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Spectroscopy

Background:

  • Magnesium-Lithium (MgLi) alloys are crucial in aerospace and defense.
  • Accurate in-situ analysis of Lithium (Li) content in MgLi alloys is challenging due to spectral interferences.
  • Laser-Induced Breakdown Spectroscopy (LIBS) is a promising technique for elemental analysis.

Purpose of the Study:

  • To investigate the feasibility of in-situ Li analysis in MgLi alloys using LIBS.
  • To evaluate the impact of pressure on spectral self-reversal for Li emission lines.
  • To develop a method for accurate Li quantification in MgLi alloys.

Main Methods:

  • Utilized Laser-Induced Breakdown Spectroscopy (LIBS) for elemental analysis.
  • Focused on two Lithium (Li) emission lines: Li I 670.8 nm and Li I 610.4 nm.
  • Employed a compact, adjustable-pressure chamber to control the analysis environment.

Main Results:

  • Observed significant self-reversal signatures for both Li emission lines at atmospheric pressure.
  • Demonstrated that lowering the pressure drastically reduces self-reversal, especially for the Li I 610.4 nm line.
  • Achieved proportional Li emission intensities for the Li I 610.4 nm line using standard MgLi alloy samples (LA91, LA141) with a cost-effective CCD detector.

Conclusions:

  • The Li I 610.4 nm emission line is more suitable for high Li concentration analysis in MgLi alloys under reduced pressure.
  • The developed compact chamber with adjustable pressure is effective for mitigating self-reversal in LIBS analysis.
  • This approach offers a viable solution for in-situ Li analysis in MgLi alloys.