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Detection of elements in slimming tea product by using laser induced breakdown spectroscopy

Laser induced breakdown spectroscopy (LIBS) has been applied to determine the element content in slimming tea product. A Q-switched Nd:YAG laser operating at 1064 nm and generating 93.7 mJ per pulses was employed to excite the pellet sample and the fluorescence emission was analyzed via spectrum ana...

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Main Author: Safie, Saleha
Format: Thesis
Language:English
Published: 2014
Subjects:
QC Physics
Online Access:http://eprints.utm.my/id/eprint/50790/1/SalehaSafieMFS2014.pdf
http://eprints.utm.my/id/eprint/50790/
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spelling my.utm.507902020-07-12T05:46:47Z http://eprints.utm.my/id/eprint/50790/ Detection of elements in slimming tea product by using laser induced breakdown spectroscopy Safie, Saleha QC Physics Laser induced breakdown spectroscopy (LIBS) has been applied to determine the element content in slimming tea product. A Q-switched Nd:YAG laser operating at 1064 nm and generating 93.7 mJ per pulses was employed to excite the pellet sample and the fluorescence emission was analyzed via spectrum analyzer. The induced spectral lines were compared with National Institute of Standards and Technology (NIST) database to identify the element. A commercial slimming tea was used as sample to be investigated whereas the natural tea leaves were used as control. The LIBS results showed that both slimming tea and natural tea leaves contain several elements including iron (Fe), sodium (Na), chromium (Cr), cobalt (Co), calcium (Ca), manganese (Mn), magnesium (Mg), silicon (Si), sulfur (S), titanium (Ti), nickel (Ni) and cesium (Cs). However, higher intensity of elements was found in slimming tea spectrum compared to natural tea leaves. The plasma temperatures calculated using Boltzmann plot were found to be 13588.95 K and 12319.50 K for slimming tea and tea leaves samples respectively whereas the electron density for slimming tea and tea leaves samples were 7.46 × 1016 cm-3 and 15.91 × 1016 cm-3, respectively. The plasma produced by this LIBS system was found to be in local thermodynamic equilibrium (LTE) condition after evaluating these plasma parameters. Quantitative analysis performed by using inductively coupled plasma mass spectroscopy (ICPMS) proved that the concentration of the elements is higher in slimming tea than in natural tea leaves. 2014-08 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/50790/1/SalehaSafieMFS2014.pdf Safie, Saleha (2014) Detection of elements in slimming tea product by using laser induced breakdown spectroscopy. Masters thesis, Universiti Teknologi Malaysia, Faculty of Science. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:87904
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic QC Physics
spellingShingle QC Physics
Safie, Saleha
Detection of elements in slimming tea product by using laser induced breakdown spectroscopy
description Laser induced breakdown spectroscopy (LIBS) has been applied to determine the element content in slimming tea product. A Q-switched Nd:YAG laser operating at 1064 nm and generating 93.7 mJ per pulses was employed to excite the pellet sample and the fluorescence emission was analyzed via spectrum analyzer. The induced spectral lines were compared with National Institute of Standards and Technology (NIST) database to identify the element. A commercial slimming tea was used as sample to be investigated whereas the natural tea leaves were used as control. The LIBS results showed that both slimming tea and natural tea leaves contain several elements including iron (Fe), sodium (Na), chromium (Cr), cobalt (Co), calcium (Ca), manganese (Mn), magnesium (Mg), silicon (Si), sulfur (S), titanium (Ti), nickel (Ni) and cesium (Cs). However, higher intensity of elements was found in slimming tea spectrum compared to natural tea leaves. The plasma temperatures calculated using Boltzmann plot were found to be 13588.95 K and 12319.50 K for slimming tea and tea leaves samples respectively whereas the electron density for slimming tea and tea leaves samples were 7.46 × 1016 cm-3 and 15.91 × 1016 cm-3, respectively. The plasma produced by this LIBS system was found to be in local thermodynamic equilibrium (LTE) condition after evaluating these plasma parameters. Quantitative analysis performed by using inductively coupled plasma mass spectroscopy (ICPMS) proved that the concentration of the elements is higher in slimming tea than in natural tea leaves.
format Thesis
author Safie, Saleha
author_facet Safie, Saleha
author_sort Safie, Saleha
title Detection of elements in slimming tea product by using laser induced breakdown spectroscopy
title_short Detection of elements in slimming tea product by using laser induced breakdown spectroscopy
title_full Detection of elements in slimming tea product by using laser induced breakdown spectroscopy
title_fullStr Detection of elements in slimming tea product by using laser induced breakdown spectroscopy
title_full_unstemmed Detection of elements in slimming tea product by using laser induced breakdown spectroscopy
title_sort detection of elements in slimming tea product by using laser induced breakdown spectroscopy
publishDate 2014
url http://eprints.utm.my/id/eprint/50790/1/SalehaSafieMFS2014.pdf
http://eprints.utm.my/id/eprint/50790/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:87904
_version_ 1674066153942548480
score 13.211869

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