Development Of Electrochemical Sensor Based On Polybromocresol Purple For The Determination Of O-aminophenol

The aim of this work was to study the effect of conducting properties of polybromocresol purplern(PBCP) in the determination of o-aminophenol. Cyclic Voltammetry (CV) and Differential pulsernVoltammetry (DPV) are employed in this study. The electrochemical oxidation of ortho-aminornphenol was carried out using a PBCP/GC electrode in aqueous acid medium. A glassy carbonrnelectrode is modified with polybromocresol purple (PBCP) over potential range of -1.5 V - 1.6rnV. O-aminophenol was studied by using cyclic voltammetry at different scan rates in thernpotential range of -0.1 V to 0.7 V. The results indicated that the oxidation reaction of the oaminophenolrnat the modified glassy carbon electrode is irreversible and controlled by diffusion.rnUnder the optimum conditions, the differential pulse voltammetric current of the sensor wasrnlinear in the concentration range of 1-100 μM with a detection limit of 0.21 μM. The modifiedrnelectrode was capable to quantify o-aminophenol in the presence of common interferences and ofrndetection in the tap water.

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