Document Details

Document Type : Thesis 
Document Title :
The Quest for Electrochemical Detection and Determination of Organic Flame Retardants
دراسة استخدام الطرق الكهروكيميائية لتحديد وتقدير مثبطات اللهب العضوية
 
Subject : Faculty of Science 
Document Language : Arabic 
Abstract : novel electrochemical sensor for the detection of organophosphate flame retardants triphenyl phosphate (TPhP) using a bare glassy carbon electrode (GCE), for the first time, is presented here. The TPhP can be directly determined through electrochemical oxidation in an aqueous mixture. The electrochemical oxidation of TPhP was investigated by cyclic voltammetry (CV). The operational parameters such as supporting electrolyte, the concentration of the aqueous mixture and scan rate have been optimized. In addition, the CV behavior of TPhP on colloidal iron nanoparticles (Fe NPs) modified GCE was also investigated. The Fe NPs suspension was coated on the surface of GCE to construct thin-film Fe NPs modified GCE electrochemical sensors. The prepared Fe NPs based electrochemical sensors were successfully used to detect TPhP in an aqueous mixture. However, the oxidation peak current on Fe NPs modified GCE was not much greater than on the bare GCE. Therefore, to avoid the complexity of electrode modification, simple, fast, sensitive and selective detection of TPhP on bare GCE is demonstrated. The square wave voltammetry (SWV) on bare GCE was used to establish a linear concentration range and find the limit of detection. Upon the optimization of square wave parameters, including amplitude, step potential, and pulse width values, the oxidation peak current was linearly related to the concentration of TPhP in the range of 0.1 - 0.9 and 1 – 8 mg ml-1 with a detection limit of 7×10^(-4) mg ml-1 for lowest range. The proposed method was successfully used to determine TPhP in tap and drinking water samples with the recovery in the range of 90-102%. The interference study was conducted and found minimal interference from the other analytes present in the real water samples. The promising method has a competitive advantage over the already existing conventional analytical methods for the detection of TPhP in an aqueous solution. 
Supervisor : Prof. Dr. Ekram Yousef Danish 
Thesis Type : Master Thesis 
Publishing Year : 1441 AH
2020 AD 
Co-Supervisor : Dr. Muhammed Tahir Soomro 
Added Date : Saturday, May 30, 2020 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
رنيم محمد المحمديAL-Mohammadi, Raneem MohammedResearcherMaster 

Files

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 46260.pdf pdf 

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