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Related Experiment Video

Updated: Sep 18, 2025

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

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Published on: April 4, 2017

LIBS matrix effect deviation compensation through acoustic-optical spectra fusion LIBS technique.

Jiayuan Zhou¹, Weihua Huang¹, Harse Sattar²

¹Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China.

|June 24, 2025

Summary

This study introduces acoustic-optical spectra fusion laser-induced breakdown spectroscopy (AOSF-LIBS) to overcome matrix effects in elemental analysis. The novel method significantly improves spectral accuracy for precise quantitative measurements.

Keywords:

Acoustic spectrogram-spectrum fusion Laser-induced breakdown spectroscopy Matrix effect Spectral deviation mapping model

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Last Updated: Sep 18, 2025

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Area of Science:

Analytical Chemistry
Spectroscopy
Materials Science

Background:

Laser-induced breakdown spectroscopy (LIBS) is vital for rapid elemental analysis.
Matrix effects in LIBS cause spectral deviations, limiting quantitative accuracy.
Existing LIBS methods struggle with spectral variability across different sample matrices.

Purpose of the Study:

To develop an innovative fusion method, acoustic-optical spectra fusion laser-induced breakdown spectroscopy (AOSF-LIBS), to compensate for LIBS matrix effects.
To enhance the precision and reliability of elemental quantification in diverse materials.
To validate the effectiveness of AOSF-LIBS in correcting spectral deviations across multiple matrices.

Main Methods:

Analyzed five key factors influencing spectral differences due to matrix effects.
Transformed acoustic signals (LIPA) into a time-frequency domain (acoustic spectrogram) to capture plasma evolution.
Fused acoustic spectrogram energy/area data with LIBS-derived plasma temperature, electron density, and elemental interference to create a spectral deviation mapping model.

Main Results:

AOSF-LIBS effectively compensated spectral deviations in aluminum, iron, titanium, and nickel matrices.
Post-compensation, R-squared values improved to >0.98 across all tested matrices.
Significant average reductions in RMSE (11.4%), MAPE (42.3%), and RSD (3.2%) were observed for both training and test sets.

Conclusions:

AOSF-LIBS successfully compensates for spectral deviations caused by matrix effects, enabling high-precision elemental quantification.
The acoustic signal plays a crucial role in the deviation compensation model, as confirmed by ablation studies.
AOSF-LIBS is poised to significantly advance the application of LIBS for elemental analysis in complex samples.