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Simultaneous Determination of Ascorbic Acid, Dopamine and Uric Acid with Chitosan‐Graphene Modified Electrode
Author(s) -
Han Dongxue,
Han Tingting,
Shan Changsheng,
Ivaska Ari,
Niu Li
Publication year - 2010
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.201000094
Subject(s) - ascorbic acid , differential pulse voltammetry , graphene , chitosan , raman spectroscopy , cyclic voltammetry , electrode , uric acid , nuclear chemistry , materials science , electrochemistry , calibration curve , detection limit , chemistry , nanotechnology , chromatography , organic chemistry , biochemistry , food science , physics , optics
Chitosan functionalized graphene was synthesized by a together‐blending and in situ chemical reduction method. UV‐vis, FT‐IR, Raman and SEM techniques were used to study the molecular structure and morphology of the resulting composite. The chitosan‐graphene modified glassy carbon electrode showed high electrocatalytic activity towards oxidations of ascorbic acid (AA), dopamine (DA) and uric acid (UA). By using the differential pulse voltammetry (DPV) as the analytical technique the calibration curves for AA, DA and UA, determined simultaneously, were found linear with a concentration range of 50–1200 μM, 1.0–24 μM and 2.0–45 μM, respectively.