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Quantification of calcium using localized normalization on laser-induced breakdown spectroscopy data


Citation

Mohd Sabri, Nursalwanie and Haider, Zuhaib and Chaudhary, Kashif Tufail and Abd Aziz, Muhammad Safwan and Ali, Jalil and Abdul Wahab, Zaidan and Abbas, Zulkifly (2016) Quantification of calcium using localized normalization on laser-induced breakdown spectroscopy data. In: 9th International Conference on Plasma Science and Applications (ICPSA 2016), 28-30 Nov. 2016, Langkawi, Kedah. (pp. 1-8).

Abstract

This paper focuses on localized normalization for improved calibration curves in laser-induced breakdown spectroscopy (LIBS) measurements. The calibration curves have been obtained using five samples consisting of different concentrations of calcium (Ca) in potassium bromide (KBr) matrix. The work has utilized Q-switched Nd:YAG laser installed in LIBS2500plus system with fundamental wavelength and laser energy of 650 mJ. Optimization of gate delay can be obtained from signal-to-background ratio (SBR) of Ca II 315.9 and 317.9 nm. The optimum conditions are determined in which having high spectral intensity and SBR. The highest spectral lines of ionic and emission lines of Ca at gate delay of 0.83 µs. From SBR, the optimized gate delay is at 5.42 µs for both Ca II spectral lines. Calibration curves consist of three parts; original intensity from LIBS experimentation, normalization and localized normalization of the spectral line intensity. The R2 values of the calibration curves plotted using locally normalized intensities of Ca I 610.3, 612.2 and 616.2 nm spectral lines are 0.96329, 0.97042, and 0.96131, respectively. The enhancement from calibration curves using the regression coefficient allows more accurate analysis in LIBS.


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Additional Metadata

Item Type: Conference or Workshop Item (Paper)
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1063/1.4978837
Publisher: AIP Publishing
Keywords: Laser-induced plasma breakdown; Calcium; Calibration curves; Localized normalization
Depositing User: Nabilah Mustapa
Date Deposited: 24 Oct 2017 05:48
Last Modified: 24 Oct 2017 05:48
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1063/1.4978837
URI: http://psasir.upm.edu.my/id/eprint/57580
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