Towards real-time calibration-free LIBS supported by machine learning

IF 3.2 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2025-02-01 DOI:10.1016/j.sab.2024.107082

Aurélien Favre , Alexis Abad , Alexandre Poux , Léo Gosse , Ahmad Berjaoui , Vincent Morel , Arnaud Bultel

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引用次数: 0

Abstract

Calibration-Free Laser-Induced Breakdown Spectroscopy (CF-LIBS) enables multi-elemental quantification without needing standards. This type of approach can be used to analyze complex samples containing traces or gradients of species. This type of diagnosis requires a high level of expertise, and is cumbersome to set up. These constraints limit its application to field diagnostics. Using the MERLIN generalized radiative transfer code, we are able to generate a diversified emission database with no dimensioning limitations. We show that training a convolutional residual network with such a database enables the quantification of 9 species, as well as evaluation of electron density and temperature, without any prior expertise at a rate greater than 10 Hz. The accuracy of this innovative method depends solely on the basic spectroscopic data (emission probabilities and Stark parameters), regardless of the thermodynamic conditions of the laser-induced plasma, as long as it is in Local Thermodynamic Equilibrium (LTE).

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来源期刊

Spectrochimica Acta Part B: Atomic Spectroscopy 物理-光谱学

CiteScore

6.10

自引率

12.10%

发文量

173

审稿时长

81 days

期刊介绍： Spectrochimica Acta Part B: Atomic Spectroscopy, is intended for the rapid publication of both original work and reviews in the following fields: Atomic Emission (AES), Atomic Absorption (AAS) and Atomic Fluorescence (AFS) spectroscopy; Mass Spectrometry (MS) for inorganic analysis covering Spark Source (SS-MS), Inductively Coupled Plasma (ICP-MS), Glow Discharge (GD-MS), and Secondary Ion Mass Spectrometry (SIMS). Laser induced atomic spectroscopy for inorganic analysis, including non-linear optical laser spectroscopy, covering Laser Enhanced Ionization (LEI), Laser Induced Fluorescence (LIF), Resonance Ionization Spectroscopy (RIS) and Resonance Ionization Mass Spectrometry (RIMS); Laser Induced Breakdown Spectroscopy (LIBS); Cavity Ringdown Spectroscopy (CRDS), Laser Ablation Inductively Coupled Plasma Atomic Emission Spectroscopy (LA-ICP-AES) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). X-ray spectrometry, X-ray Optics and Microanalysis, including X-ray fluorescence spectrometry (XRF) and related techniques, in particular Total-reflection X-ray Fluorescence Spectrometry (TXRF), and Synchrotron Radiation-excited Total reflection XRF (SR-TXRF). Manuscripts dealing with (i) fundamentals, (ii) methodology development, (iii)instrumentation, and (iv) applications, can be submitted for publication.