title: Application of multiwalled carbon nanotubes/ionic liquid modified electrode for amperometric determination of sulfadiazine.
abstract: A highly sensitive amperometric sulfadiazine sensor based on coating multiwalled carbon nanotubes (MWCNTs) and N-octyl-pyridinium-hexafluorophosphate (OPPF(6)) ionic liquid composite on a glassy carbon (GC) electrode is described. The MWCNTs/OPPF(6) composite contributed new properties to electrochemical sensors by combining the advantages of both ionic liquids and MWCNTs. Compared with bare GC electrode, the electrocatalytic activity of MWCNTs/OPPF(6) generated a greatly improved electrochemical detection of sulfadiazine including low oxidation potential, high current responses, and good anti-fouling performance. The oxidation peak currents of sulfadiazine obtained on the MWCNTs/OPPF(6) coated GC electrode were proportional to the concentration of sulfadiazine within the range of 3.3-35.4 μM with a detection limit of 0.21 μM.
authors.affiliation: Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou, PR China. xpnghong@zstu.edu.cn
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Hong
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhu
authors.forename: Jingying
authors.initials: J
authors.lastname: Ma
mesh_terms: D004566:Electrodes; D004867:Equipment Design; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D057230:Limit of Detection; D037742:Nanotubes, Carbon / Q000737:chemistry*; D009795:Octanes / Q000737:chemistry*; D010084:Oxidation-Reduction; D011199:Potentiometry / Q000295:instrumentation*; D011726:Pyridinium Compounds / Q000737:chemistry*; D013411:Sulfadiazine / Q000032:analysis*
chemical_list: D037742:Nanotubes, Carbon; D009795:Octanes; D011726:Pyridinium Compounds; D013411:Sulfadiazine