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Updated: Mar 20, 2026

Quantitative Analysis of Vacuum Induction Melting by Laser-induced Breakdown Spectroscopy
Published on: June 10, 2019
[Joint Analyses of Na2SO4 Solution by Laser Induced Breakdown Spectroscopy and Raman Spectroscopy].
A new hybrid Laser-Induced Breakdown Spectroscopy (LIBS) and Raman spectroscopy system enables simultaneous underwater detection of chemical species. This combined spectroscopic sensor shows great potential for deep-sea exploration and ocean monitoring applications.
Area of Science:
- Spectroscopy
- Oceanography
- Analytical Chemistry
Context:
- Deep-sea exploration requires advanced sensors for multi-species, multi-phase, and stand-off detection.
- Laser-Induced Breakdown Spectroscopy (LIBS) and Raman spectroscopy are complementary techniques offering elemental and molecular analysis.
- Developing integrated systems is crucial for expanding underwater chemical sensing capabilities.
Purpose:
- To develop and evaluate a hybrid LIBS-Raman spectroscopic system for underwater chemical analysis.
- To assess the feasibility of simultaneous detection of anions and cations in aqueous solutions, specifically Na2SO4.
- To investigate the performance of the combined system under varying laser energy conditions.
Summary:
- A hybrid LIBS-Raman system was constructed using a shared laser, spectrometer, and detector for simultaneous underwater analysis.
- The system successfully detected sulfate anions (SO4(2-)) via Raman spectroscopy and sodium cations (Na) via LIBS in an aqueous solution.
- Simultaneous detection was achieved above a pulse energy of 3.6 mJ, though increasing energy decreased Raman signal-to-noise due to bremsstrahlung radiation.
Impact:
- The study demonstrates the significant potential of combined LIBS-Raman spectroscopy for effective underwater chemical detection.
- This integrated approach offers a novel solution for real-time chemical monitoring in marine environments.
- The findings pave the way for enhanced deep-sea exploration and oceanographic research tools.
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