Determination of elements in rice using laser induced breakdown spectroscopy and atomic absorption spectroscopy

Laser-induced breakdown spectroscopy (LIBS) technique offers simplicity, real-time analysis and requires minimal or no sample preparation, in contrast to conventional method of elemental analysis. In this research, LIBS technique was used for elemental analysis of rice. Conventional atomic absorptio...

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Main Author:	Abdul Wahid, Rahmat
Format:	Thesis
Published:	2014
Subjects:	QC Physics
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spelling	my-utm-ep.484012017-08-08T07:40:06Z Determination of elements in rice using laser induced breakdown spectroscopy and atomic absorption spectroscopy 2014 Abdul Wahid, Rahmat QC Physics Laser-induced breakdown spectroscopy (LIBS) technique offers simplicity, real-time analysis and requires minimal or no sample preparation, in contrast to conventional method of elemental analysis. In this research, LIBS technique was used for elemental analysis of rice. Conventional atomic absorption spectroscopy (AAS) technique was used for validation of LIBS findings and quantification of elements. Twelve commercially available rice of different varieties, grain sizes and polishing rates were selected as samples. Pellets from each sample were prepared for qualitative analysis using LIBS technique. An ungated LIBS system was constructed using Nd:YAG pulsed laser as the excitation source and an atomic emission detection system consist of optical fibre, spectrometer and computer. Fifty spectra from different spots on each pellet were averaged and analyzed using OriginPro 8.5 for baseline removal and peak findings. The system developed proved to be reliable for the detection of elements since the plasma produced satisfied the criteria for local thermodynamic equilibrium. This is confirmed in the calculation of plasma temperature and electron density. The elements in rice detected in this work are magnesium, calcium, potassium, sodium, hydrogen and oxygen. For the AAS technique, rice samples were digested with aqua regia solution and analyzed with PerkinElmer AAnalyst 400 spectrometer. Calcium and potassium in the samples were validated using AAS technique. Quantitative analysis from AAS technique shows that samples from brown rice have higher calcium (209.22 mg·kg-1) and potassium (2757.96 mg·kg-1) concentration compared to others 2014 Thesis http://eprints.utm.my/id/eprint/48401/ masters Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
topic	QC Physics
spellingShingle	QC Physics Abdul Wahid, Rahmat Determination of elements in rice using laser induced breakdown spectroscopy and atomic absorption spectroscopy
description	Laser-induced breakdown spectroscopy (LIBS) technique offers simplicity, real-time analysis and requires minimal or no sample preparation, in contrast to conventional method of elemental analysis. In this research, LIBS technique was used for elemental analysis of rice. Conventional atomic absorption spectroscopy (AAS) technique was used for validation of LIBS findings and quantification of elements. Twelve commercially available rice of different varieties, grain sizes and polishing rates were selected as samples. Pellets from each sample were prepared for qualitative analysis using LIBS technique. An ungated LIBS system was constructed using Nd:YAG pulsed laser as the excitation source and an atomic emission detection system consist of optical fibre, spectrometer and computer. Fifty spectra from different spots on each pellet were averaged and analyzed using OriginPro 8.5 for baseline removal and peak findings. The system developed proved to be reliable for the detection of elements since the plasma produced satisfied the criteria for local thermodynamic equilibrium. This is confirmed in the calculation of plasma temperature and electron density. The elements in rice detected in this work are magnesium, calcium, potassium, sodium, hydrogen and oxygen. For the AAS technique, rice samples were digested with aqua regia solution and analyzed with PerkinElmer AAnalyst 400 spectrometer. Calcium and potassium in the samples were validated using AAS technique. Quantitative analysis from AAS technique shows that samples from brown rice have higher calcium (209.22 mg·kg-1) and potassium (2757.96 mg·kg-1) concentration compared to others
format	Thesis
qualification_level	Master's degree
author	Abdul Wahid, Rahmat
author_facet	Abdul Wahid, Rahmat
author_sort	Abdul Wahid, Rahmat
title	Determination of elements in rice using laser induced breakdown spectroscopy and atomic absorption spectroscopy
title_short	Determination of elements in rice using laser induced breakdown spectroscopy and atomic absorption spectroscopy
title_full	Determination of elements in rice using laser induced breakdown spectroscopy and atomic absorption spectroscopy
title_fullStr	Determination of elements in rice using laser induced breakdown spectroscopy and atomic absorption spectroscopy
title_full_unstemmed	Determination of elements in rice using laser induced breakdown spectroscopy and atomic absorption spectroscopy
title_sort	determination of elements in rice using laser induced breakdown spectroscopy and atomic absorption spectroscopy
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2014
_version_	1747817381302894592

Determination of elements in rice using laser induced breakdown spectroscopy and atomic absorption spectroscopy

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