Poly(3-methylthiophene) (P3MT) film was synthesized by potentiodynamic method on Pt electrode in methylene chloride solution containing 0.10M tetrabuthlammonium perchlorate supporting electrolyte and used for the determination of hydroquinone (HQ) with amperometric I-t method in solution consisting of NaHSO 4 /Na 2 SO 4 (SBS; pH 2.0). This modified electrode has a lower working potential and good operational stability due to reducing electrode fouling when compared with the direct oxidation of HQ at the bare Pt electrode. Limit of detection, limit of quantification, and the linear response range were found to be 1.32 3 10 25 mM, 4.41 3 10 25 mM, and between 4.41 3 10 25 -50.0 mM (R 2 5 0.997), at 0.50 V versus saturated calomel electrode, respectively. HQ determination in complex matrix was checked using real samples to demonstrate the applicability of modified electrode. V C 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40859.
P henol is the simplest compound of benzene, and the main structure of phenolic compounds like hydroquinone and catechol. Phenol and its chemical derivatives are widely used in industrial area such as pharmaceutical drugs, cosmetic, pesticides, textile, dyes and petroleum refineries [1,2]. Phenol is released to the environment during its production, its use in phenolic resins, and organic synthesis [3]. Phenol is found in petroleum products, and it can be released by combustion of wood and auto exhaust [3]. Phenol is also released by the natural corruption of organic wastes including benzene. Phenol is a major metabolite of benzene [4], which is found widely in the environment, therefore, phenol may be occurred in the environment as a result of the natural corruption of benzene. Phenol and its vapors are toxic, and may give rise to harmful effects on the central nervous system and heart. Because of its toxicity and resistance to common microorganisms, detection of phenol is important in the environment [5]. A number of chromatographic [6,7] and spectrophotometric
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