Work

Polarization-corrected phase velocity system for LIBS-based quantification of heavy metals in soil

Year: 2025

Type: article

Abstract: The instability of laser energy significantly degrades the precision of laser-induced breakdown spectroscopy (LIBS) in the analysis of heavy-metal elements in soil.A phase velocity (PV) modeling framework with polarization correction was developed.The Fresnel equations and modified Sellmeier equations were employed to characterize the angular dependence of the transmittance of an extraordinary ray (e-ray) on the complex refractive indices and incident angles.We used Cu, Pb, Cr, and Fe in soil samples as targets.Under seven energies, the system improved linear correlation coefficients to 0.99057 and 0.99737, and the stability of recognition improved by an average of 7.271%.

Source: Chinese Optics Letters

DOI: 10.3788/col202624.013602

Authors: Jiang Xu, Muhua Liu, Mingyin Yao, Jiaqi Liang, Xiao Wang

Institution: Jiangxi Agricultural University

Language: English

Topic: Laser-induced spectroscopy and plasma

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funder: National Natural Science Foundation of China

Awards: G199045183, G6906232797