title: A novel nanoporous film electrode based on electrochemical polymerization of ionic liquid and its application in sensitive determination of magnolol.
abstract: A polymeric film modified glassy carbon electrode was electrochemically fabricated with potential step technique using 1-butyl-3-[3-(N-pyrrole)propyl] imidazolium tetrafluoroborate ionic liquid as a monomer. Followed by being treated with sodium dodecyl sulfonate solution, a hydrophobic film bearing poly{1-butyl-3-[3-(N-pyrrolyl)propyl]imidazolium dodecyl sulfonate} moiety was modified onto electrode surface. The substitution was confirmed by X-ray photoelectron spectroscopy. The morphology of the polymeric film electrode surface was characterized with scanning electron microscopy. Electrochemical behaviors of magnolol at the hydrophobic polymeric film electrode were systematically investigated with voltammetry. Compared with the unmodified glassy carbon electrode, the oxidation peak shift slightly towards positive potential and the oxidation peak current significantly increased. Under optimal conditions, the oxidation peak current was linearly related to the magnolol concentration in the range of 1.0 × 10(-8) to 1.0 × 10(-6) mol L(-1) and 1.0 × 10(-6) to 5.0 × 10(-5) mol L(-1). The detection limit was estimated to be 4.55 × 10(-9) mol L(-1) (S/N=3). The polymerized ionic liquid film electrode was successfully used to analysis magnolol in M. officinalis. The result was consistent with that obtained by high performance liquid chromatography.
authors.affiliation: Key Laboratory of Biologic Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi 445000, China.
authors.forename: Xinjian
authors.initials: X
authors.lastname: Song
authors.affiliation: Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China.
authors.forename: Bing
authors.initials: B
authors.lastname: Wang
authors.affiliation: Chaozhou Quality and Measurement Supervision and Inspection Institute, Chaozhou 521011, China.
authors.forename: Yina
authors.initials: Y
authors.lastname: Huang
authors.affiliation: Chaozhou Quality and Measurement Supervision and Inspection Institute, Chaozhou 521011, China.
authors.forename: Liqing
authors.initials: L
authors.lastname: Li
authors.affiliation: Chaozhou Quality and Measurement Supervision and Inspection Institute, Chaozhou 521011, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Li
authors.affiliation: Key Laboratory of Biologic Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi 445000, China; Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China. Electronic address: lichychem@163.com.
authors.forename: Chunya
authors.initials: C
authors.lastname: Li
authors.affiliation: Key Laboratory of Biologic Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi 445000, China. Electronic address: zhang_shh@163.com.
authors.forename: Shenghui
authors.initials: S
authors.lastname: Zhang
mesh_terms: D001713:Biphenyl Compounds / Q000032:analysis*; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D057927:Hydrophobic and Hydrophilic Interactions; D052578:Ionic Liquids / Q000737:chemistry*; D017705:Lignans / Q000032:analysis*; D057230:Limit of Detection; D008855:Microscopy, Electron, Scanning; D036103:Nanotechnology; D056951:Photoelectron Spectroscopy; D058105:Polymerization; D015203:Reproducibility of Results
chemical_list: D001713:Biphenyl Compounds; D052578:Ionic Liquids; D017705:Lignans; C005498:magnolol
keywords: Electrochemical polymerization; Ionic liquid; Magnolol; Polymer; Voltammetry