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Determination of lead content in whitening cream using laser induced breakdown spectroscopy analysis

Laser Induced Breakdown Spectroscopy (LIBS) technique was applied to determine the concentration of heavy metal such as Pb in five different whitening creams available from retail shop and open market in Johor, Malaysia. The whitening cream in the form of an emulsion was painted on the glass slide a...

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Main Author: Wan Mohd. Shukri, Wan Norsyuhada
Format: Thesis
Language:English
Published: 2014
Subjects:
QC Physics
Online Access:http://eprints.utm.my/id/eprint/50774/25/WanNorsyuhadaWanMohdShukriMFS2014.pdf
http://eprints.utm.my/id/eprint/50774/
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spelling my.utm.507742020-07-12T03:29:20Z http://eprints.utm.my/id/eprint/50774/ Determination of lead content in whitening cream using laser induced breakdown spectroscopy analysis Wan Mohd. Shukri, Wan Norsyuhada QC Physics Laser Induced Breakdown Spectroscopy (LIBS) technique was applied to determine the concentration of heavy metal such as Pb in five different whitening creams available from retail shop and open market in Johor, Malaysia. The whitening cream in the form of an emulsion was painted on the glass slide and then cryogenically frozen in refrigerator. The harden sample of whitening creams were irradiated with light Q-switch Nd:YAG laser at five different positions on the same sample. The spectral lines of six whitening creams were identified using National Institute of Standards and Technology (NIST) Database. Finally, Pb was detected in all the studied samples and their concentration in the range of 1.78 ppm – 4.64 ppm with limit of detection which is ~ 1 ppm. The LIBS results were validated by Inductive Couple Plasma Mass Spectroscopy (ICP-MS) technique with percentage difference in the range of 2.73% – 7.60%. The detection of Pb in the whitening creams is under permissible limit as set by Malaysian standard. However, the limitation is over as set by WHO which is 0.05 ppm for daily used. Thus, it is better to take precaution because continuously using creams may lead to accumulative toxicity in the body beyond the acceptable limit. Thus, the high sensitivity, portable and in-situ system allow LIBS to be an important technique in cosmetic industries. 2014-09 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/50774/25/WanNorsyuhadaWanMohdShukriMFS2014.pdf Wan Mohd. Shukri, Wan Norsyuhada (2014) Determination of lead content in whitening cream using laser induced breakdown spectroscopy analysis. Masters thesis, Universiti Teknologi Malaysia, Faculty of Science. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:86251
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
Wan Mohd. Shukri, Wan Norsyuhada
Determination of lead content in whitening cream using laser induced breakdown spectroscopy analysis
description Laser Induced Breakdown Spectroscopy (LIBS) technique was applied to determine the concentration of heavy metal such as Pb in five different whitening creams available from retail shop and open market in Johor, Malaysia. The whitening cream in the form of an emulsion was painted on the glass slide and then cryogenically frozen in refrigerator. The harden sample of whitening creams were irradiated with light Q-switch Nd:YAG laser at five different positions on the same sample. The spectral lines of six whitening creams were identified using National Institute of Standards and Technology (NIST) Database. Finally, Pb was detected in all the studied samples and their concentration in the range of 1.78 ppm – 4.64 ppm with limit of detection which is ~ 1 ppm. The LIBS results were validated by Inductive Couple Plasma Mass Spectroscopy (ICP-MS) technique with percentage difference in the range of 2.73% – 7.60%. The detection of Pb in the whitening creams is under permissible limit as set by Malaysian standard. However, the limitation is over as set by WHO which is 0.05 ppm for daily used. Thus, it is better to take precaution because continuously using creams may lead to accumulative toxicity in the body beyond the acceptable limit. Thus, the high sensitivity, portable and in-situ system allow LIBS to be an important technique in cosmetic industries.
format Thesis
author Wan Mohd. Shukri, Wan Norsyuhada
author_facet Wan Mohd. Shukri, Wan Norsyuhada
author_sort Wan Mohd. Shukri, Wan Norsyuhada
title Determination of lead content in whitening cream using laser induced breakdown spectroscopy analysis
title_short Determination of lead content in whitening cream using laser induced breakdown spectroscopy analysis
title_full Determination of lead content in whitening cream using laser induced breakdown spectroscopy analysis
title_fullStr Determination of lead content in whitening cream using laser induced breakdown spectroscopy analysis
title_full_unstemmed Determination of lead content in whitening cream using laser induced breakdown spectroscopy analysis
title_sort determination of lead content in whitening cream using laser induced breakdown spectroscopy analysis
publishDate 2014
url http://eprints.utm.my/id/eprint/50774/25/WanNorsyuhadaWanMohdShukriMFS2014.pdf
http://eprints.utm.my/id/eprint/50774/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:86251
_version_ 1674066152001634304
score 13.211869

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