الفهرس | Only 14 pages are availabe for public view |
Abstract The aim of this thesis was devoted to fabricate new modified electrodes square wave voltammetry of ammonium ion and 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 sensors based on carbon paste electrodes (CPE) modified by poly(1,5-diaminoanthraquinone) (P1,5- DAAQ) has been developed for individual and simultaneous determination of copper (Cu2+) and antimony(sb+3) using square wave anodic stripping voltammetry (SWASV). The combination of MWCNT and p-1,5-DAAQ maximized the electrocatalytic activity of the modified electrode, which exhibited high sensitivity and long term stability. Selenite (Se4+), a significant source of water pollution above the permissible limits, is considered a valuable metal by environmentalists. Its autonomous monitoring in natural water is highly required for online, fast, and facile techniques. In this study, we described a novel electrochemical sensor that utilized a carbon paste electrode (CPE) that was modified using multiwall carbon nanotubes (MWCNTs) and poly(1-aminoanthraquinone(p- AAQ) for finding Se4+ in water samples. On the other hand the pAAQ/Ag/MWCNT/ CPE modified electrochemical sensor that used a carbon paste electrode (CPE) that was modified using silver nanoparticles, multiwall carbon nanotubes (MWCNTs) and poly-1-aminoanthraquinone(p-AAQ) for finding NH4+ in water samples. |