title: Highly sensitive electrochemical determination of Sunset Yellow based on gold nanoparticles/graphene electrode.
abstract: An electrochemical sensor was prepared using Au nanoparticles and reduced graphene successfully decorated on the glassy carbon electrode (Au/RGO/GCE) through an electrochemical method which was applied to detect Sunset Yellow (SY). The as-prepared electrode was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM) and electrochemical measurements. The results of cyclic voltammetry (CV) proved that Au/RGO/GCE had the highest catalytic activity for the oxidation of SY as compared with GCE, Au/GCE, and RGO/GCE. Differential pulse voltammetry (DPV) showed that the linear calibration curves for SY on Au/RGO/GCE in the range of 0.002 μM-109.14 μM, and the detection limit was estimated to be 2 nM (S/N = 3). These results suggested that the obtained Au/RGO/GCE was applied to detect SY with high sensitivity, low detection limit and good stability, which provided a promising future for the development of portable sensor in food additives.
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.
authors.forename: Jin
authors.initials: J
authors.lastname: Wang
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.
authors.forename: Beibei
authors.initials: B
authors.lastname: Yang
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.
authors.forename: Huiwen
authors.initials: H
authors.lastname: Wang
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.
authors.forename: Ping
authors.initials: P
authors.lastname: Yang
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China. Electronic address: duyk@suda.edu.cn.
authors.forename: Yukou
authors.initials: Y
authors.lastname: Du
mesh_terms: D001391:Azo Compounds / Q000032:analysis*; D002244:Carbon / Q000737:chemistry; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D055664:Electrochemical Techniques; D004566:Electrodes; D005503:Food Additives / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D057230:Limit of Detection; D053768:Metal Nanoparticles / Q000737:chemistry*; D015203:Reproducibility of Results
chemical_list: D001391:Azo Compounds; D005503:Food Additives; D002244:Carbon; D006046:Gold; D006108:Graphite; C005842:6-hydroxy-5-((p- sulfophenyl)azo)-2-naphthalenesulfonic acid disodium salt
keywords: Au nanoparticles; Electrochemical determination; Graphene; Sunset Yellow