title: Highly-sensitive and rapid detection of ponceau 4R and tartrazine in drinks using alumina microfibers-based electrochemical sensor.
abstract: Alumina microfibers were prepared and used to construct an electrochemical sensor for simultaneous detection of ponceau 4R and tartrazine. In pH 3.6 acetate buffer, two oxidation waves at 0.67 and 1.01 V were observed. Due to porous structures and large surface area, alumina microfibers exhibited high accumulation efficiency to ponceau 4R and tartrazine, and increased their oxidation signals remarkably. The oxidation mechanisms were studied, and their oxidation reaction involved one electron and one proton. The influences of pH value, amount of alumina microfibers and accumulation time were examined. As a result, a highly-sensitive, rapid and simple electrochemical method was newly developed for simultaneous detection of ponceau 4R and tartrazine. The detection limits were 0.8 and 2.0 nM for ponceau 4R and tartrazine. This new sensor was used in different drink samples, and the results consisted with the values that obtained by high-performance liquid chromatography.
authors: Britton Chance Center for Biomedical Photonics at Wuhan, National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Systems Biology Theme, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
authors: Yuanyuan
authors: Y
authors: Zhang
authors: Key Laboratory for Large-Format Battery Materials and System, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
authors: Lintong
authors: L
authors: Hu
authors: Britton Chance Center for Biomedical Photonics at Wuhan, National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Systems Biology Theme, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China. Electronic address: xliu@hust.edu.cn.
authors: Xin
authors: X
authors: Liu
authors: Britton Chance Center for Biomedical Photonics at Wuhan, National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Systems Biology Theme, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
authors: Bifeng
authors: B
authors: Liu
authors: Key Laboratory for Large-Format Battery Materials and System, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. Electronic address: kbwu@hust.edu.cn.
authors: Kangbing
authors: K
authors: Wu
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D001391:Azo Compounds / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D004396:Coloring Agents / Q000737:chemistry*; D055664:Electrochemical Techniques / Q000379:methods*; D009282:Naphthalenesulfonates / Q000737:chemistry*; D013645:Tartrazine / Q000032:analysis*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D009282:Naphthalenesulfonates; D013645:Tartrazine; D000537:Aluminum Oxide; C576297:ponceau 4R
keywords: Alumina microfibers; Electrochemical sensor; Ponceau 4R; Simultaneous detection; Tartrazine