title: An enhanced electrochemical platform based on graphene oxide and multi-walled carbon nanotubes nanocomposite for sensitive determination of Sunset Yellow and Tartrazine.
abstract: A novel electrochemical platform was designed for the simultaneous determination of Sunset Yellow (SY) and Tartrazine (TT), synthetic food dyes, by combining the signal amplification properties of graphene oxide (GO) and the excellent electronic and antifouling properties of multi-walled carbon nanotubes (MWCNTs). Stable dispersion of GO/MWCNTs composite was produced by sonication mixing. Compared with glassy carbon, MWCNTs and GO electrodes, GO/MWCNTs electrode exhibited strong enhancement effect and greatly increased the oxidation signal of SY and TT. Under optimized conditions, the enhanced anodic peak currents represented the excellent analytical performance of simultaneous detection of SY and TT in the range of 0.09-8.0 μM, with a low limit of detection of 0.025 μM for SY and 0.01 μM for TT (S/N = 3), respectively. To further validate its possible application, the proposed method was successfully used for the determination of SY and TT in orange juice with satisfactory results.
authors.affiliation: College of Science, Engineering Institute, Jiangxi Agricultural University, Nanchang 330045, PR China.
authors.forename: Xinlan
authors.initials: X
authors.lastname: Qiu
authors.affiliation: College of Science, Engineering Institute, Jiangxi Agricultural University, Nanchang 330045, PR China; State Key Laboratory of Chemical Biosensing & Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China. Electronic address: lulimin816@126.com.
authors.forename: Limin
authors.initials: L
authors.lastname: Lu
authors.affiliation: College of Science, Engineering Institute, Jiangxi Agricultural University, Nanchang 330045, PR China.
authors.forename: Jing
authors.initials: J
authors.lastname: Leng
authors.affiliation: College of Science, Engineering Institute, Jiangxi Agricultural University, Nanchang 330045, PR China.
authors.forename: Yongfang
authors.initials: Y
authors.lastname: Yu
authors.affiliation: College of Science, Engineering Institute, Jiangxi Agricultural University, Nanchang 330045, PR China; State Key Laboratory of Chemical Biosensing & Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China. Electronic address: wxf19980201@126.com.
authors.forename: Wenmin
authors.initials: W
authors.lastname: Wang
authors.affiliation: College of Science, Engineering Institute, Jiangxi Agricultural University, Nanchang 330045, PR China.
authors.forename: Min
authors.initials: M
authors.lastname: Jiang
authors.affiliation: College of Science, Engineering Institute, Jiangxi Agricultural University, Nanchang 330045, PR China.
authors.forename: Ling
authors.initials: L
authors.lastname: Bai
mesh_terms: D001391:Azo Compounds / Q000032:analysis*; D032084:Citrus sinensis; D055664:Electrochemical Techniques; D000067030:Fruit and Vegetable Juices / Q000032:analysis; D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D064347:Microscopy, Electrochemical, Scanning; D053761:Nanocomposites / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013645:Tartrazine / Q000032:analysis*
chemical_list: D001391:Azo Compounds; D037742:Nanotubes, Carbon; D006108:Graphite; C005842:6-hydroxy-5-((p- sulfophenyl)azo)-2-naphthalenesulfonic acid disodium salt; D013645:Tartrazine
keywords: Electrochemical sensor; Graphene oxide; Simultaneous determination; Sunset Yellow; Tartrazine