Vinod Kumar Gupta
Indian Institute of Technology Roorkee, India
Title: New molecular imprinted voltammetric sensor for sensitive determination of ochratoxin A
Biography
Biography: Vinod Kumar Gupta
Abstract
In this report, a novel molecular imprinted voltammetric sensor based on silver nanoparticles (AgNPs) involved in a polyoxometalate (H3PW12O40, POM) functionalized reduced graphene oxide (rGO) modified glassy carbon electrode (GCE) was presented for determination of ochratoxin A (OCH). The developed surfaces were characterized using scanning electron microscope (SEM), transmission electron microscope (TEM), x-ray photoelectron spectroscopy (XPS) and x-ray diffraction (XRD) method. OCH imprinted GCE was prepared via electropolymerization process of 100 mM phenol as monomer in the presence of phosphate buffer solution (pH 6.0) containing 25 mM OCH. The linearity range and the detection limit of the method were calculated as 5.0×10-11-1.5×10-9 M and 1.6×10-11 M, respectively. The voltammetric sensor was applied to grape juice and wine samples with good selectivity and recovery. The stability of the voltammetric sensor was also reported.