Comparison and optimizaiton of gated and ungated libs systems

Laser-induced breakdown spectroscopy (LIBS) is a direct and versatile analytical technique that performs the elemental composition analysis based on optical emission. The performance of the LIBS technique relies on the choice of experimental conditions. High cost, accuracy and precision insufficienc...

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Main Author:	Sim, Yit Ching
Format:	Thesis
Language:	English
Published:	2017
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/81422/1/SimYitChingMFS2017.pdf
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spelling	my-utm-ep.814222019-08-23T04:07:18Z Comparison and optimizaiton of gated and ungated libs systems 2017 Sim, Yit Ching QC Physics Laser-induced breakdown spectroscopy (LIBS) is a direct and versatile analytical technique that performs the elemental composition analysis based on optical emission. The performance of the LIBS technique relies on the choice of experimental conditions. High cost, accuracy and precision insufficiency, understanding of experimental conditions are key challenges in LIBS. In this research work, a comparison between gated and ungated LIBS systems is presented to determine the efficiency and applicability of ungated LIBS system in context of quantities analysis of elements. Two different LIBS systems gated (high cost) and ungated (low cost) are compared for quantitative analysis of Ca and Mg elements which are prepared in laboratory with known composition. Optimization of experimental parameters (Gate delay, integration time, and laser energy) has performed for both gated and ungated LIBS systems to compare performance of two systems based on signal to background ratio. The calibration curves are plotted to determine the accuracy and sensitivity of both gated and ungated systems. The accuracy of system is obtained from regression (R2) and sensitivity from the slope of plotted calibration curves at optimized conditions for both LIBS systems. The R2 and slope values obtained from calibration curves show that the gated measurements are better as compared to those values obtained from the ungated measurements. However, the R2 > 0.8 obtained from calibration curves with ungated measurements indicates the potential of ungated LIBS for quantitative investigations which can be further improved by mitigating the influencing factor. 2017 Thesis http://eprints.utm.my/id/eprint/81422/ http://eprints.utm.my/id/eprint/81422/1/SimYitChingMFS2017.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:124858 masters Universiti Teknologi Malaysia Physics
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QC Physics
spellingShingle	QC Physics Sim, Yit Ching Comparison and optimizaiton of gated and ungated libs systems
description	Laser-induced breakdown spectroscopy (LIBS) is a direct and versatile analytical technique that performs the elemental composition analysis based on optical emission. The performance of the LIBS technique relies on the choice of experimental conditions. High cost, accuracy and precision insufficiency, understanding of experimental conditions are key challenges in LIBS. In this research work, a comparison between gated and ungated LIBS systems is presented to determine the efficiency and applicability of ungated LIBS system in context of quantities analysis of elements. Two different LIBS systems gated (high cost) and ungated (low cost) are compared for quantitative analysis of Ca and Mg elements which are prepared in laboratory with known composition. Optimization of experimental parameters (Gate delay, integration time, and laser energy) has performed for both gated and ungated LIBS systems to compare performance of two systems based on signal to background ratio. The calibration curves are plotted to determine the accuracy and sensitivity of both gated and ungated systems. The accuracy of system is obtained from regression (R2) and sensitivity from the slope of plotted calibration curves at optimized conditions for both LIBS systems. The R2 and slope values obtained from calibration curves show that the gated measurements are better as compared to those values obtained from the ungated measurements. However, the R2 > 0.8 obtained from calibration curves with ungated measurements indicates the potential of ungated LIBS for quantitative investigations which can be further improved by mitigating the influencing factor.
format	Thesis
qualification_level	Master's degree
author	Sim, Yit Ching
author_facet	Sim, Yit Ching
author_sort	Sim, Yit Ching
title	Comparison and optimizaiton of gated and ungated libs systems
title_short	Comparison and optimizaiton of gated and ungated libs systems
title_full	Comparison and optimizaiton of gated and ungated libs systems
title_fullStr	Comparison and optimizaiton of gated and ungated libs systems
title_full_unstemmed	Comparison and optimizaiton of gated and ungated libs systems
title_sort	comparison and optimizaiton of gated and ungated libs systems
granting_institution	Universiti Teknologi Malaysia
granting_department	Physics
publishDate	2017
url	http://eprints.utm.my/id/eprint/81422/1/SimYitChingMFS2017.pdf
_version_	1747818327874469888

Comparison and optimizaiton of gated and ungated libs systems

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