Enhanced Electrocatalytic Reduction of Oxadiargyl and Its Determination on 2‐(4‐((4‐Acetylphenyl)diazenyl)phenylamino)‐ethanol Modified Graphene‐Paste Electrode |
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| Authors: | M Saber‐Tehrani A Pourhabib S Waqif Husain M Arvand |
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| Institution: | 1. Department of Chemistry, Science and Research Branch, Islamic Azad University, P.?O. Box: 1415‐775, Tehran, Iran;2. Department of Chemistry, Faculty of Science, University of Guilan, Namjoo Street, P.?O. Box: 1914, Rasht, Iran tel: +98?131?3233262;3. fax: +98?131?3233262 |
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| Abstract: | The electrochemical behavior of oxadiargyl at a graphene‐paste electrode modified with an azo dye, 2‐(4‐((4‐acetylphenyl)diazenyl)phenylamino)ethanol (ADPE), ADPE/MGRPE was investigated. The modified electrode showed high electrocatalytic activity toward oxadiargyl. The apparent electron transfer rate constant (ks) and charge transfer coefficient (α) between electrode and ADPE were 1.16 s?1 and 0.41, respectively. The differential pulse voltammetry response of the modified graphene‐paste electrode was linear against the concentration of oxadiargyl in the range from 0.03 to 1.4 mg L?1. The limit of detection was found to be 1.3 µg L?1 (S/N=3). The practical analytical utility of this electrode was demonstrated by measurement of oxadiargyl in river water, soil and rice samples. |
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| Keywords: | Oxadiargyl Electrocatalytic activity Graphene‐paste modified electrode Voltammetric measurements |
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