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Electrochemical Determination of Cu(II) Ions in Chloride‐Rich Environment Using Polyviologen‐Modified Glassy Carbon Electrodes
Author(s) -
Hsu PeiFen,
Ciou WanLun,
Chen PoYu
Publication year - 2010
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201000037
Subject(s) - chemistry , glassy carbon , cathodic stripping voltammetry , stripping (fiber) , detection limit , electrochemistry , chloride , electrode , inorganic chemistry , voltammetry , cathodic protection , anodic stripping voltammetry , analytical chemistry (journal) , carbon fibers , electroanalytical method , buffer solution , ion exchange , square wave , ion , cyclic voltammetry , potentiometric titration , chromatography , materials science , organic chemistry , composite material , physics , voltage , quantum mechanics , composite number
Polyviologen was formed on glassy carbon electrodes using potentiostatic electropolymerization in pH 4.2 Britton‐Robinson buffer solution. The polyviologen‐modified glassy carbon electrode (PVGCE) was employed to determine Cu(II) in chloride‐rich solutions in order to demonstrate the electroanalytical application of polyviologen. The PVGCE was found capable of enhancing the detection limit of Cu(II) in chloride‐rich environment because of the anion‐exchange feature of the polymer film. Cathodic stripping square‐wave voltammetry (CSSWV) was employed to determine Cu(II). The dependence of the cathodic stripping current on the concentration of Cu(II) was linear from 0.06 ppm to 9.53 ppm with a regression coefficient of 0.999. The detection limit is 0.02 ppm (σ = 3). Regeneration of the PVGCE can be achieved by simply immersing the electrode in a stirred 0.5 M NaCl solution.