Calibration-free approaches for quantitative analysis of a brass sample

Vikas Gupta; Abhishekh Kumar Rai; Tejmani Kumar; Akash Kumar Tarai; Manoj Kumar Gundawar; A. K. Rai

doi:10.1515/zna-2023-0280

Article

Calibration-free approaches for quantitative analysis of a brass sample

Vikas Gupta , Abhishekh Kumar Rai , Tejmani Kumar , Akash Kumar Tarai , Manoj Kumar Gundawar and A. K. Rai

Published/Copyright: March 7, 2024

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From the journal Zeitschrift für Naturforschung A Volume 79 Issue 6

Abstract

Calibration-free laser-induced breakdown spectroscopy (CF-LIBS) is successfully employed to determine the chemical composition of brass samples using the LIBS technique. The sample is irradiated with a Q-switched Nd: YAG laser with a pulse width of 5 ns to generate laser-induced plasma (LIP) on the sample surface. The time evolution spectra were recorded from the surface of the brass sample only with an accumulation of five laser shots to get one LIP spectrum. Time-resolved LIP spectra have been utilized to identify the most appropriate time window (where the plasma is optically thin and in local thermal equilibrium) suitable for CF-LIBS implementation. Stoichiometric ablation is also demonstrated for metallic brass samples with the aforementioned laser in the present study. To obtain definitive quantitative information from LIP, the characterization of the plasma, i.e., spectral line intensity, spectral line broadening, electron number density, and plasma temperature, has been analyzed in this paper. Based on two different CF-LIBS algorithms, the brass sample composition was determined and found to be in good agreement with the certified results. This paper also compares and contrasts both strategies, as well as discusses their place and importance. The results of the present manuscript illustrate the potential applicability of CF-LIBS for yielding precise and accurate compositions of brass.

Keywords: laser-induced breakdown spectroscopy; alloy; brass; stoichiometric ablation; CF-LIBS

Corresponding author: A. K. Rai, Laser Spectroscopy Research Laboratory, Department of Physics, University of Allahabad, Allahabad, 211002, India, E-mail: awadheshkrai@gmail.com

Research ethics: Not Applicable.
Author contributions: VG, AKR, TK: conceptualization, methodology, data curation, writing-original draft. AKR: supervision, methodology, writing review and AKR, TK, AKT, MG, Writing review and editing.
Competing interests: The authors declare that they have no conflict of interest.
Research funding: One of the authors, Mr. Vikas Gupta, is thankful to UGC-CSIR for providing financial assistance as a junior research fellow for doing the research work.
Data availability: All of the data reported in the paper are presented in the main text. Any other data will be provided on request.

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Received: 2023-10-12

Accepted: 2024-02-05

Published Online: 2024-03-07

Published in Print: 2024-06-25

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Articles in the same Issue

https://doi.org/10.1515/zna-2023-0280

Keywords for this article

laser-induced breakdown spectroscopy; alloy; brass; stoichiometric ablation; CF-LIBS