Electrochemical Study of Iodide in the Presence of Phenol and o-Cresol: Application to the Catalytic Determination of Phenol and o-Cresol

Sensors

Lida Fotouhi¹  Mahsa Ganjavi¹ 

[1] Department of Chemistry, Faculty of Science, Al-Zahra University, P.O. Box 1993891176, Tehran, Iran, Tel. [phone], Fax. [phone]

关键词: Electrochemical study;    determination;    phenol;    o-cresol;   

DOI  :  10.3390/s41100170

来源: mdpi

【 摘 要 】

The electrochemical oxidation of iodide in the presence of phenol and o-cresol was investigated at a glassy carbon electrode in buffered media by cyclic voltammetry, linear sweep voltammetry and controlled–potential coulometry. The experimental results indicate that the phenol and o-cresol convert to their derivatives after participating in a halogenation coupled reaction (quasi-catalytic reaction) following the oxidation of iodide to iodine. The concentrations of phenol and o-cresol have been determined in aqueous solutions according to the linear dependence of quasi-catalytic peak currents with the concentration. The calibration graphs show two linear sections of 0.0 to 1.0×10^-4 M and 2.0×10^-4 to 1.0 ×10^-3 M for phenol and 4.2×10^-5 to 1.0×10^-4 M and 2.0×10^-4 to 1.0×10^-3 M for o-cresol. The theoretical detection limits and the relative standard deviations for ten measurements of phenol and o-cresol are 1.125×10^-5 M, 1.06% and 4.201×10^-5 M, 1.44%, respectively.

【 授权许可】

Unknown   
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