Negash, Negussie (PhD)Bahta, Medhin2019-09-042023-11-092019-09-042023-11-092018-04-02http://etd.aau.edu.et/handle/12345678/18977A Glassy Carbon Electrode Was Modified With A Poly Bromocresol Purple And Electrochemically Reduced Graphene Oxide. The Modified Electrode Was Characterized, And Used To Electrochemically Determine Catechol (1, 2-Dihydroxy Benzene, Cc) Using Cyclic And Differential Pulse Voltammetry And Exhibited Good Electrocatalytic Activities Toward The Oxidation Of Cc. The Peak Currents Were Linear With The Cc Concentrations In The Range Of 5–140M With A 0.998 Correlation Coefficient And A Corresponding Detection Limits Of 0.8M . The Effect Of Hydroquinone, Ascorbic Acid, Phenol And Dichlorophenol As Interfering Substances On The Peak Current Of Catechol Was Examined Using Differential Pulse Voltammetry. The Modified Electrode Exhibited Good Sensitivity, And Reproducibility For The Determination Of Cc Indicating The Promising Applications Of The Modified Electrode In Real Sample Analysis.enElectroanalyticalCatecholConducting PolymersElectropolymerizationBromocresol PurpleElectrochemically Reduced Graphene OxideModified Electrodeand VoltammetryThesis