title: New molecular imprinted voltammetric sensor for determination of ochratoxin A.
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 ochrattoxin 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 100mM phenol as monomer in the presence of phosphate buffer solution (pH6.0) 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.
authors.affiliation: Department of Metallurgical and Materials Engineering, Faculty of Engineering, Sinop University, Sinop, Turkey. Electronic address: mehmetyola@gmail.com.
authors.forename: Mehmet Lütfi
authors.initials: ML
authors.lastname: Yola
authors.affiliation: Indian Institute of Technology, Department of Chemistry, Roorkee, Roorkee 247667, India; Department of Applied Chemistry, University of Johannesburg, Johannesburg, South Africa. Electronic address: vinodfcy@iitr.ac.in.
authors.forename: Vinod Kumar
authors.initials: VK
authors.lastname: Gupta
authors.affiliation: Department of Chemical Engineering, Faculty of Engineering, Pamukkale University, Denizli, Turkey.
authors.forename: Necip
authors.initials: N
authors.lastname: Atar
mesh_terms: D001628:Beverages / Q000032:analysis; D002244:Carbon / Q000737:chemistry; D055664:Electrochemical Techniques; D004566:Electrodes; D006108:Graphite / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D057230:Limit of Detection; D053768:Metal Nanoparticles / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D054802:Molecular Imprinting; D009793:Ochratoxins / Q000032:analysis*; D056951:Photoelectron Spectroscopy; D012834:Silver / Q000737:chemistry; D017973:Tungsten Compounds / Q000737:chemistry; D014920:Wine / Q000032:analysis; D000099294:Polyoxometalates
chemical_list: D002244:Carbon; D006108:Graphite; D009793:Ochratoxins; D012834:Silver; D017973:Tungsten Compounds; C102296:polyoxometalate I; D000099294:Polyoxometalates; C025589:ochratoxin A
keywords: Molecular imprinted sensor; Ochratoxin A; Polyoxometalate; Reduced graphene oxide; Silver nanoparticles