title: Electrochemical behavior of amaranth and its sensitive determination based on Pd-doped polyelectrolyte functionalized graphene modified electrode.
abstract: In this work, poly(sodium p-styrenesulfonate) (PSS)-functionalized graphene supported palladium nanoparticles (Pd) composites were fabricated with simple ultrasonic bath method. The morphology and structure of PSS-GR-Pd composites were characterized using UV-vis absorption spectra, X-ray diffraction and Transmission Electron Microscopy. By combining the merits of the PSS-GR and Pd NPs, a new electrochemical sensor was erected to detect amaranth based on the PSS-GR-Pd nanocomposites. The electrochemical behavior of amaranth was investigated systematically in 0.1molL-1phosphate buffer solution (PBS 2.0). At the optimum parameter, Ipawas found to be linearly dependent on the concentrations of amaranth (1×10-7-9×10-6molL-1). The detection limit was 7nM (S/N=3) and sensitivity was 5.85μAμM-1. Finally, this system was utilized for determining amaranth in soft drink using the standard addition method.
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
authors.forename: Yudong
authors.initials: Y
authors.lastname: Gao
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China; Department of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, PR China.
authors.forename: Lu
authors.initials: L
authors.lastname: Wang
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
authors.forename: Yulong
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
authors.forename: Lina
authors.initials: L
authors.lastname: Zou
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
authors.forename: Gaiping
authors.initials: G
authors.lastname: Li
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China. Electronic address: yebx@zzu.edu.cn.
authors.forename: Baoxian
authors.initials: B
authors.lastname: Ye
mesh_terms: D000548:Amaranth Dye / Q000032:analysis* / Q000737:chemistry; D002253:Carbonated Beverages / Q000032:analysis*; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D057230:Limit of Detection; D053761:Nanocomposites / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D000071228:Polyelectrolytes / Q000737:chemistry*
chemical_list: D000071228:Polyelectrolytes; D010165:Palladium; D006108:Graphite; D000548:Amaranth Dye
keywords: Amaranth; Electroanalytical; Graphene; Pd NPs