Document Details

Document Type : Thesis 
Document Title :
Developing of New Solid Hydrophobic Platforms for Rapid Determination and Speciation of Trace Concentrations of Inorganic Species in Water
استحداث أسطح كارهة (غير محبة) للماء للتقدير الكمي والتصنيف السريع لتركيزات متناهية الصغر لبعض المكونات غير العضوية في المياه
 
Subject : Faculty of Science 
Document Language : Arabic 
Abstract : Trace analysis of total element content of metal ions provides no clear evidence on their oxidation states and toxicity. The greatest vital properties of such class of chemicals that distinguish them from extra contaminants, as they are not decomposable in the aquatic media and environmental water samples. Thus, the work in this thesis is focused on developing low cost, selective and short analytical time wax modified paper as a solid platform for total determination and chemical speciation of trace levels of iron (II & III) and fluoride ions in water. The established method was based upon the use of wax modified paper as a solid platform for droplet-based colorimetric assay for the iron (III) chelate with the chromogenic reagent 2- (5-Bromo-2-pyridylazo) -5- (diethylamino) phenol (5-Br-PADAP). Upon surface modification, goniometry analysis confirmed a strong hydrophobic character (θ ~124º) of the wax-modified paper whereas scanning electron microscopy helped us to understand the changes in the morphology of cellulose fibers. The droplet based Fe3+ assay was simple to execute and end-result (color change) via naked eyes with the total assay time not exceedingly more than 20 min. The LOD and LDR for Fe3+ assay executed on wax-modified paper were 0.01 (μg/mL) and 1-1000 (μg/mL) respectively. The proposed assay has several advantages such as: inexpensive modification/platform, low reagent/analyte volume, improved specificity and simple read-out. Hence, the method can be widely accepted for point-of-use application especially in regions dealing with iron and limited laboratory facilities. 
Supervisor : Prof. Dr. Mohammad Soror El-Shahawi 
Thesis Type : Master Thesis 
Publishing Year : 1441 AH
2020 AD 
Co-Supervisor : Dr. Liyakat Hamid Mujawar 
Added Date : Tuesday, July 28, 2020 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
دعاء عبدالرزاق وعظ الدينWazuddin, Doaa AbdulrazzaqResearcherMaster 

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