Document Details

Document Type : Thesis 
Document Title :
Spectroscopic Analysis of Plastic samples Using Laser Induced Breakdown Spectroscopy
التحليل الطيفي لعينات من البلاستيك باستخدام طيف الانهيار المستحث بالليزر
 
Subject : physics department 
Document Language : Arabic 
Abstract : Plastic is being used frequently in our daily life. There is an increasing need to determine concentration of toxic heavy metals in plastic since those elements may cause some dangerous diseases such as cancer. Laser Induced Breakdown Spectroscopy (LIBS) technique was applied for spectroscopic analysis of food contact plastic sample collected from manufacturing factories located at industrial city of Jeddah, Saudi-Arabia. This method is based on the study of spectroscopic analysis of plasma resulting from interaction of intense laser radiation with sample medium. Atomic emission spectra of different toxic heavy metals present in the plastic samples such as Antimony, Arsenic, Lead, Mercury and Tin were recorded in the 200-800 nm region. The 1064 nm laser radiation of Nd:YAG laser with pulse duration of 5 ns was used. Prior to quantitative determination of the elemental concentration, the LIBS system was calibrated for these metals. The dependence of time delay and laser beam energy on the elemental spectra was investigated. According to our estimate, the LIBS quantitative analysis detected concentrations exceed the permitted limits of toxic metals such as As and Hg. Therefore, some of the food contacts plastics which are produced by Saudi factories are not save to be used frequently. The LIBS technique seems to be a powerful analytical tool for metals analysis in the plastics. In future, the limits of detection could be improved by using a double pulse LIBS technique. 
Supervisor : Dr. Ahmed Albakry 
Thesis Type : Master Thesis 
Publishing Year : 1433 AH
2012 AD 
Co-Supervisor : Dr. M.A.N. Razvi 
Added Date : Tuesday, May 1, 2012 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
ظلال محمد العليAl-Ali, Thilal MohammedResearcherMaster 

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