title: A novel voltammetric sensor based on poly(l-Citrulline)/SWCNTs composite film modified electrode for sensitive determination of picroside II.
abstract: A novel voltammetric sensor was constructed by simple dripping single-walled carbon nanotubes (SWCNTs) on to the glass carbon electrode (GCE) firstly and electro-polymerizing L-Citrulline film subsequently. The resulting poly(L-Citrulline)/SWCNTs/GCE showed a significant voltammetric response to picroside II due to the synergistic effect of SWCNTs and poly(L-Citrulline) film. The first electroanalytical method of picroside II was proposed with detection linear range from 8.0 × 10(-8) to 5.0 × 10(-6) mol L(-1) and a detection limit of 3 × 10(-8) mol L(-1). The high sensitivity, selectivity and long-term stability made the sensor suitable for the determination of picroside II. Moreover, based on the systematically investigation and some kinetics parameters calculated in the experimentation, the reaction mechanism of picroside II at the poly(L-Citrulline)/SWCNTs modified GCE was obtained reliably. Lastly, the proposed sensor was used for the determination of picroside II in real sample with satisfactory results. This work promoted the potential applications of amino acid materials and SWCNTs in electro-chemical sensors.
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
authors.forename: Wenjing
authors.initials: W
authors.lastname: Wang
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: 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: D002138:Calibration; D002384:Catalysis; D002934:Cinnamates / Q000032:analysis* / Q000737:chemistry; D002956:Citrulline / Q000737:chemistry*; D004563:Electrochemistry / Q000295:instrumentation*; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D057888:Iridoid Glucosides / Q000032:analysis* / Q000737:chemistry; D057230:Limit of Detection; D037742:Nanotubes, Carbon / Q000737:chemistry*; D032261:Picrorhiza / Q000737:chemistry; D058105:Polymerization
chemical_list: D002934:Cinnamates; D057888:Iridoid Glucosides; D037742:Nanotubes, Carbon; D002956:Citrulline; C416837:picroside II
keywords: L-Citrulline; Picroside II; SWCNTs; Synergistic effect; Voltammetric sensor