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Fabrication of Nanocomposite Containing Naphthoquinone and Nanogold Supported on Poly(2,6‐pyridinedicarboxylic acid) Film for Voltammetric Determination of N ‐Acetyl‐ L ‐Cysteine
Author(s) -
Raoof Jahan Bakhsh,
Ojani Reza,
Chekin Fereshteh,
Jahanshahi Mohsen,
RashidNadimi Sahar
Publication year - 2009
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200900267
Subject(s) - detection limit , nanocomposite , sulfonic acid , electrode , nuclear chemistry , cysteine , nanoparticle , chemistry , materials science , nanotechnology , polymer chemistry , chromatography , organic chemistry , enzyme
A modified electrode was fabricated by grafting of poly (2,6‐pyridinedicarboxylic acid) film (PDC) by electropolymerization of 2,6‐pyridinedicarboxylic acid on the glassy carbon electrode (GCE). Then, gold nanoparticles (NG) and 1,2‐naphthoquinone‐4‐sulfonic acid sodium (Nq) were immobilized on the PDC/GCE to prepare Nq/NG/PDC/GCE by immersing electrode into NG and Nq solution, respectively. The Nq species on NG/PDC/GCE could catalyze electrooxidation of N ‐acetyl‐ L ‐cysteine (NAC) with lowering the over potential by about 600 mV. This method used for detection of NAC in dynamic range from 4.0×10 −6 M to 1.30×10 −4 M with a detection of limit (2 σ ) 8.0×10 −7 M.