الفهرس 
Heavy metals contaminationOnly 14 pages are availabe for public view
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Abstract
The current thesis is aimed to fabricate new modified electrodes for anodic
stripping voltammetry of some heavy metals using simple electrochemical methods
as alternatives to traditional spectrophotometric techniques which are very
complicated, very expensive and couldn’t be used for in field measurements in
contrast our proposed methods distinguished with many advantages summarize in
its simplicity and the ability for using for on field measurements.
A novel electrochemical sensor based on glassy carbon electrode (GCE)
modified by poly(1,2-diaminoanthraquinone) (P1,2-DAAQ) has been developed
for individual and simultaneous determination of Cd2+, Pb2+, Cu2+ and Hg2+ using
square wave anodic stripping voltammetry (SWASV). P1,2-DAAQ was
characterized by Square wave voltammetry (SWV) and scanning electron
microscope (SEM). Several analytical parameters such as the type of electrolyte
solution, polymer film thickness, metal deposition time and deposition potential
were investigated and optimized. Optimal conditions were obtained by using five
scan cycles for polymer synthesis and 120 seconds at –1.6 V for metal
electrodeposition in acetate buffer solution. Good linear responses to Cd2+, Pb2+,
Cu2+ and Hg2+ in the concentration range 0 to 120 µg/L were obtained. The limit of
detections (LOD) for simultaneous determination of Cd2+, Pb2+, Cu2+ and Hg2+
were 0.3 µg/L, 0.58 µg/L, 1.94 µg/L and 0.26 µg/L, respectively. The developed
method was also applied for the detection of them in real water samples for which
favourable results obtained as compared to results obtained using inductively
coupled plasma – optical emission spectroscopy (ICP-OES).