This review provides a comparatively comprehensive and systematic introduction to recent developments in chemical composition imaging based on LIBS, with focus the principle, operation, development.

The effects of inter-pulse delay on the quantitative analysis femtosecond-nanosecond double-pulsed laser-induced breakdown spectroscopy (fs-ns DP-LIBS) for assessing Pb in soil have been systematically studied this work. A femtosecond pulse laser was focused to produce a filament, which used ablate sample and an appreciable amount aerosol particles ejected from surface at low density. Scattering images were obtained, found 800 µs. After delay, nanosecond Nd:YAG re-ablated obtained spectral...

Combined laser-induced breakdown spectroscopy (LIBS) and hyperspectral imaging (HSI) with machine learning algorithms can be used to identify rice quality the place of origin production rapidly accurately.

Abstract Discarded aluminum alloys are a form of recyclable metal materials, and their classification identification highly important. In this work, laser‐induced breakdown spectroscopy (LIBS) technique combined with principal component analysis (PCA) least‐squares support‐vector machine (LSSVM) algorithm were used to classify identify five types alloys. Exploratory by PCA was performed achieve better segregation. The accuracy the (SVM) LSSVM for alloy 98.33% 100%, respectively. higher...

An experimental solution that combines hyperspectral imaging (HSI) and laser-induced breakdown spectroscopy (LIBS) applied to large-scale material surface chemical analysis is investigated..

Rapid and reliable identification of mineral species is a challenging but crucial task with promising application prospects in mineralogy, metallurgy, geology. Spectroscopic techniques such as laser-induced breakdown spectroscopy (LIBS) Raman (RS) efficiently capture the elemental composition structural information minerals, making them potential tool for situ real-time analysis minerals. This study introduces an integrated LIBS-RS system fusion LIBS RS spectra coupled machine learning to...

We report on the observation of dual-pulses laser-produced plasmas (DP-LPPs), following a femtosecond Ti: sapphire pulse laser ablate soil generated substantial number aerosol particle clusters target and then nanosecond Nd:YAG re-ablated particles clusters. The temporal evolution fs (fs-LPPs) highlight different in plasma plume expansion dynamics distributions where, initial position velocity are 0.79 mm 4.8 km/s, terminal is 2.2 gradually become slower slower, delay time range 150 ns to...

Ultrafast laser filament-induced breakdown spectroscopy (FIBS) is a potential technique for quantitative analysis of trace elements. In this work, we investigate the effect distance between focusing lens and target surface on FIBS Mn element in aluminum alloys, several major parameters are calculated such as linear correlation coefficient ( R 2 ), limits detection (LOD), relative standard deviation (RSD), root-mean-square error cross-validations (RMSECV). The results show that parameter...

In this paper, the spatially-resolved characteristics, such as emission intensity, plasma temperature, and electron density, of femtosecond filament induced soil were experimentally studied, spatial evolution limit detection (LOD) was obtained along channel propagation. The experiment results show that spectrum intensity LOD Pb I 405.78 nm trended opposingly propagation, maximum minimum are at a certain distance channel, value for element is 1.31 ± 0.04 ppm.

This study explores the utilization of laser-induced breakdown spectroscopy (LIBS) combined with chemometric techniques in fire investigation. We employed two distinct heating devices to generate residues from intumescent fire-resistant coatings (IFRC). The residues' top and bottom layers were analyzed using LIBS. processed spectral data minimize variables applied partial least squares discriminant analysis (PLS-DA) for categorizing residual layers. Furthermore, we used principal component...

Compared with the traditional spectral analysis methods, such as inductively coupled plasma mass spectrometry method, atomic absorption sensitivity, accuracy and resolution of laser induced breakdown spectroscopy technology is relatively lower. Due to advantages o f low ablation thresholds, high-spatial resolution, minimal invasion, high-efficiency transportation femtosecond laser, method (fs-LIBS) has become an active topic in recent years. In order further improve performance fs-LIBS,...

The plasma induced when laser interacts with matter (solid, gas, etc.) can radiate a wide range of electromagnetic waves. Its radiation bands from extreme ultraviolet, visible, infrared, terahertz to radio frequency microwave. Radiation in these wavelength has applications, so it is great significance study radiation. We studied the characteristics nanosecond (1064nm, 8ns) optical influence parameters on intensity and time evolution were obtained. Furthermore, we obtained effect target...

The existence of the background signal is one factors that leads to spectral intensity uncertainty, which dramatically affects measurement stability, repetitiveness, and quantitative accuracy laser-induced breakdown spectroscopy (LIBS). In this work, polarization resolved LIBS (PR-LIBS) partial least square (PLS) regression models were proposed improve stability qualitative analysis steel alloy elements. obtained spectra pre-processed select an appropriate number variables, relationship...