Electrochemical Determination of Simazine Using Clay Modified Carbon Paste Electrode

Tsegaye, Endale (2005) Electrochemical Determination of Simazine Using Clay Modified Carbon Paste Electrode. Masters thesis, Addis Ababa University.

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Abstract

The electrochemical behavior of simazine (triazinic herbicide) was investigated by cyclic voltammetry at clay modified carbon paste electrode. The appearance of two fold peak current obtained at clay modified carbon paste electrode was used as an analytical signal for developing differential pulse adsorptive stripping voltammetric method for the determination of simazine using clay modified carbon paste electrode. Systematic and detailed studies of various experimental conditions were conducted to establish the optimal clay amount, pH of solution and instrumental parameters. A linear dependence between peak current and concentration of simazine was observed for concentrations between 1.0 х 10-6 M to 20 х 10-6 M. At higher concentrations (20 х 10-6 M to 80 х 10-6 M), another linear dependence was observed. The relative standard deviation for six successive determinations were 3.3 and 2.58% for 2.0 х 10-6 M and 20 х 10-6 M simazine, respectively. The detection limit (concentration equal to three times the standard deviation of peak current) was 0.25 х 10-6 M. The developed method was applied to the direct determination of simazine in spiked potable water sample with satisfactory result.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Voltammetry, Herbicides, Simazine, Clay, Carbon paste electrode.
Subjects:	Q Science > Q Science (General) Q Science > QD Chemistry
Divisions:	Africana
Depositing User:	Selom Ghislain
Date Deposited:	28 Jun 2018 10:54
Last Modified:	28 Jun 2018 10:54
URI:	http://thesisbank.jhia.ac.ke/id/eprint/6133

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