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Author Jiang, Lingyan ♦ Liu, Chuanyin ♦ Jiang, Liping ♦ Peng, Zhen ♦ Lu, Guanghan
Source J-STAGE
Content type Text
Publisher The Japan Society for Analytical Chemistry
Language English
Abstract A chemically modified electrode based on a chitosan-multiwall carbon nanotube (MWNT) coated glassy carbon electrode (GCE) is described, which exhibits an attractive ability to determine dopamine (DA) and ascorbic acid (AA) simultaneously. The modified electrode exhibited a high differential pulse voltammetry (DPV) current response to DA at 0.144 V and AA at -0.029 V (vs. SCE) in a 0.1 mol $l^{-1}$ phosphate buffer solution (pH = 7.2). The properties and behaviors of the chitosan-multiwall carbon nanotube modified electrode (MC/GCE) were characterized using cyclic voltammetry (CV) and DPV methods. The mechanism for the discrimination of dopamine from ascorbic acid at MC/GCE is discussed. The linear calibration range for DA and AA were 5 × $10^{-7}$ mol $l^{-1}$ to 1 × $10^{-4}$ mol $l^{-1}$ (r = 0.997), and 5 × $10^{-6}$ mol $l^{-1}$ to 1 × $10^{-3}$ mol $l^{-1}$ (r = 0.996), respectively. The MC/GCE showed good sensitivity, selectivity and stability.
ISSN 09106340
Learning Resource Type Article
Publisher Date 2004-01-01
e-ISSN 13482246
Journal Analytical Sciences(analsci)
Volume Number 20
Issue Number 7
Page Count 5
Starting Page 1055
Ending Page 1059


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