Abstract
Electrochemically reduced graphene oxide nanoribbons (ErGONRs) have been prepared, characterized and utilized for sensing of a flavone, baicalein (BAI) by adsorptive stripping differential pulse voltammetric (AdSDPV) and square wave voltammetric (SWV) methods. BAI showed redox peaks (Epa = 0.582 V and Epc = 0.557 V) and an irreversible oxidation peak at 1.402 V on ErGONRs/GCE in phosphate buffer of pH 3. A 50-fold enhanced electrochemical response was observed at ErGONRs/GCE for BAI when compared to that noticed at bare GCE. The parameters concerning the electrochemical behavior of BAI were carefully optimized. Under optimized conditions, SWV and AdSDPV methods showed linearity in the range of 10 nM–87.4 μM and 0.4 μM–50 μM, respectively. Applicability of the proposed electrode was demonstrated by determining BAI in urine samples
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