title: Facile preparation of molecularly imprinted polypyrrole-graphene-multiwalled carbon nanotubes composite film modified electrode for rutin sensing.
abstract: In this paper, a novel molecularly imprinted composite film modified electrode was presented for rutin (RT) detection. The modified electrode was fabricated by electropolymerization of pyrrole on a graphene-multiwalled carbon nanotubes composite (G-MWCNTs) coated glassy carbon electrode in the presence of RT. The netlike G-MWCNTs composite, prepared by in situ hydrothermal process, had high conductivity and electrocatalytic activity. At the resulting MIP/G-MWCNTs/GCE electrode RT could produce a sensitive anodic peak in pH 1.87 Britton-Robinson buffer solution. The factors affecting the electrochemical behavior and response of RT on the modified electrode were carefully investigated and optimized. Under the selected conditions, the linear response range of RT was 0.01-1.0μmolL-1and the detection limit (S/N=3) was 5.0nmolL-1. The electrode was successfully applied to the determination of RT in buckwheat tea and orange juice samples, and the recoveries for standards added were 93.4-105%.
authors: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei Province, PR China.
authors: Lite
authors: L
authors: Yang
authors: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei Province, PR China.
authors: Juan
authors: J
authors: Yang
authors: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei Province, PR China.
authors: Bingjie
authors: B
authors: Xu
authors: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei Province, PR China.
authors: Faqiong
authors: F
authors: Zhao
authors: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei Province, PR China. Electronic address: bzzeng@whu.edu.cn.
authors: Baizhao
authors: B
authors: Zeng
mesh_terms: D002244:Carbon / Q000737:chemistry; D032084:Citrus sinensis; D055664:Electrochemical Techniques; D004566:Electrodes; D000067030:Fruit and Vegetable Juices / Q000032:analysis; D006108:Graphite / Q000737:chemistry*; D057230:Limit of Detection; D054802:Molecular Imprinting; D053761:Nanocomposites / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D012431:Rutin / Q000032:analysis* / Q000737:chemistry; D013662:Tea / Q000737:chemistry
chemical_list: D037742:Nanotubes, Carbon; D011108:Polymers; D011758:Pyrroles; D013662:Tea; C067635:polypyrrole; D012431:Rutin; D002244:Carbon; D006108:Graphite
keywords: Electrochemical sensor; Graphene; Molecularly imprinted polymer; Multiwalled carbon nanotubes; Rutin