Abstract
This study presents a new approach for rapid detection of sulfide using a glassy carbon electrode (GCE) modified with alizarin (Az) and reduced graphene oxide (rGO) nanosheets. The fabricate Az–rGO/GCE sensor shows a notable electrocatalytic activity to sulfide oxidation. The currents of anodic peak centered at +465mV in 0.2M pH 7.0 phosphate buffer were related linearly to the concentrations of sulfide, based on the cyclic voltammetric studies. The linear range was 0.002–3.28mM, and the detection limit was 1μM. The proposed method was applied in sulfide determination of hydrogen sulfide pretreated fruits, and the method was also verified with recovery studies.
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