Effect of spatial confinement on Pb measurements in soil by femtosecond laser-induced breakdown spectroscopy View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2019-12-04

AUTHORS

Shangyong Zhao, Xun Gao, Anmin Chen, Jingquan Lin

ABSTRACT

This study investigates the spatial confinement effect on Pb measurements in soil by femtosecond laser-induced breakdown spectroscopy (fs-LIBS). Spatial confinement within a cylindrical cavity significantly enhanced the intensities of the Pb plasma emission spectrum and the enhancement increased with decreasing diameter of the cylindrical cavity. When the cavity diameter was increased from 3 to 6 mm, the spectral emission enhancement was more delayed and the spatial confinement effect was weakened. The limit of detection (LOD), coefficient of determination (R2), relative standard deviation (RSD), and root mean squared error of cross-validation (RMSECV) were 8.85 ± 0.16 mg/kg, 98.34%, 4.98%, and 0.45%, respectively in the 3 mm diameter cavity and 33.16 ± 1.45 mg/kg, 97.66%, 8.21%, and 0.54%, respectively, in the unconfined measurements. The cylindrical cavity improved the detection sensitivity (as evidenced by the LODs) and the detection accuracy (as evidenced by the RMSECV and RSD values) of fs-LIBS. Overall, the spatial confinement method promises to improve the analytical figures of merit of the fs-LIBS technology. More... »

PAGES

7

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00340-019-7354-1

DOI

http://dx.doi.org/10.1007/s00340-019-7354-1

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1123125202


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