title: A Simple and Sensitive Voltammetric Method for the Determination of Orange II Based on a Functionalized Graphene-Modified Electrode.
abstract: A simple and sensitive voltammetric sensor for Orange II was developed, based on a poly(sodium p-styrenesulfonate)-functionalized graphene-modified glassy carbon electrode. This voltammetric sensor showed strong accumulation ability and an excellent voltammetric response for Orange II. The electrochemical behavior of Orange II was systematically investigated in a pH 7.0 phosphate buffer solution. By linear sweep voltammetry, under optimum conditions, a good linear relationship was obtained between peak currents and Orange II concentrations in the wider range of 3 × 10(-8) to 5 × 10(-6) mol/L, with an LOD of 1 × 10(-8) mol/L. In addition, the proposed Orange II sensor was successfully applied to real food samples with satisfactory recovery.
authors.affiliation: Zhengzhou University, College of Chemistry and Molecular Engineering, Zhengzhou 450001, China.
authors.forename: Yudong
authors.initials: Y
authors.lastname: Gao
authors.affiliation: Zhengzhou University, College of Chemistry and Molecular Engineering, Zhengzhou 450001, China.
authors.forename: Zhengkun
authors.initials: Z
authors.lastname: Xie
authors.affiliation: Zhengzhou University, College of Chemistry and Molecular Engineering, Zhengzhou 450001, China.
authors.forename: Yulong
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Zhengzhou University, College of Chemistry and Molecular Engineering, Zhengzhou 450001, China.
authors.forename: Lina
authors.initials: L
authors.lastname: Zou
authors.affiliation: Zhengzhou University, College of Chemistry and Molecular Engineering, Zhengzhou 450001, China.
authors.forename: Baoxian
authors.initials: B
authors.lastname: Ye
mesh_terms: D001391:Azo Compounds / Q000032:analysis*; D001557:Benzenesulfonates / Q000032:analysis*; D055664:Electrochemical Techniques; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry
chemical_list: D001391:Azo Compounds; D001557:Benzenesulfonates; D010710:Phosphates; D006108:Graphite; C009285:sodium polymetaphosphate; C014722:2-naphthol orange