title: Application of multi-walled carbon nanotubes modified carbon ionic liquid electrode for electrocatalytic oxidation of dopamine.
abstract: A simple, sensitive, and reliable method based on a multi-walled carbon nanotubes (MWNTs) modified carbon ionic liquid electrode (CILE) has been successfully developed for determination of dopamine (DA) in the presence of ascorbic acid (AA). The acid-treated MWNTs with carboxylic acid functional groups could promote the electron-transfer reaction of DA and inhibit the voltammetric response of AA. Due to the good performance of the ionic liquid, the electrochemical response of DA on the MWNTs/CILE was better than that of other MWNTs modified electrodes. Under the optimum conditions a linear calibration plot was obtained in the range 5.0×10(-8) to 2.0×10(-4) mol L(-1) and the detection limit was 1.0×10(-8) mol L(-1).
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan, Changsha, PR China.
authors.forename: Yonghong
authors.initials: Y
authors.lastname: Li
authors.forename: Xinsheng
authors.initials: X
authors.lastname: Liu
authors.forename: Xiaoying
authors.initials: X
authors.lastname: Liu
authors.forename: Nannan
authors.initials: N
authors.lastname: Mai
authors.forename: Yuandong
authors.initials: Y
authors.lastname: Li
authors.forename: Wanzhi
authors.initials: W
authors.lastname: Wei
authors.forename: Qingyun
authors.initials: Q
authors.lastname: Cai
mesh_terms: D004298:Dopamine / Q000737:chemistry*; D004563:Electrochemistry; D004566:Electrodes; D052578:Ionic Liquids / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010084:Oxidation-Reduction
chemical_list: D052578:Ionic Liquids; D037742:Nanotubes, Carbon; D004298:Dopamine