An electrochemical sensor based on molecularly imprinted polydopamine coated on reduced graphene oxide for selective detection of ornidazole

Abstract The electrochemical sensing of ornidazole ( OR ) was achieved with a highly selective sensor fabricated by a combination of an electrochemically reduced graphene oxide ( ERGO ) and molecularly imprinted polydopamine ( PDA ). The sensor ( OR‐imp @ PDA/ERGO/GCE ) was synthesized by electrochemical polymerization of dopamine (DA) on ERGO modified glassy carbon electrode ( GCE ). The analytical response of the sensor changed linearly with OR concentration varying from 1.5 × 10 −9 M to 1.0 × 10 −8 M and 1.0 × 10 −8 M to 2.0 × 10 −7 M, and the detection limit was defined as 1.1 × 10 −9 M. The proposed sensor ensured the highly sensitive detection of OR concentration because of the advantages of ERGO and molecularly imprinted PDA .