|
Addis Ababa University Libraries Electronic Thesis and Dissertations: AAU-ETD! >
Faculty of Science >
Thesis - Chemistry >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/123456789/2951
|
| Title: | Electrochemical Detection of Fenitrothion Using Poly-(4-amino-3- hydroxynaphthalene-1-sulfonic acid) Modified Glassy Carbon Electrode |
| Authors: | Samuel, Abicho |
| Advisors: | Shimelis Admassie (PhD) |
| Keywords: | Electropolymerization; Fenitrothion; Square wave voltammetry; Organophosphorus pesticides (OPPs);
ynaphtalene-1-sulfonic acid
4-Amino-3-hydrox
Cyclic voltammetry |
| Copyright: | Jun-2009 |
| Date Added: | 10-May-2012 |
| Publisher: | AAU |
| Abstract: | A glassy carbon electrode (GCE) was modified with electropolymerized film of 4-amino-3-
hydroxynaphthalene-1-sulfonic acid (AHNSA) in pH 5.0 acetate buffer solution (ABS). Cyclic
voltammetry and square voltammetry were used as the analytical technique to compare the sensitivity of
the modified glassy carbon electrode with bare glassy carbon electrode. Fenitrothion detection for
different concentrations was performed by square wave voltammetry in pH 5.0 acetae buffer solution
(ABS). The irreversible reduction peak current which is at -594 mV is linear with the fenitrothion
concentration in the range of 4.0 x 10-6 – 2.0 x 10-5 M, and the detection limit is
8.0 x 10
-8
M. As a
result, the square wave voltammetry at modified glassy carbon electrode provides a better sensitivity and
it is faster and less expensive than traditional ones, such as, high performance liquid chromatography or
gas chromatography, which is time consuming, expensive and can not be carried out in field 34-36. |
| URI: | http://hdl.handle.net/123456789/2951 |
| Appears in: | Thesis - Chemistry
|
Items in the AAUL Digital Library are protected by copyright, with all rights reserved, unless otherwise indicated.
|
