Determination of trace xanthine by anodic stripping voltammetry with carbon nanotube modified glassy carbon electrode

被引：33

作者：

Zhao, G

Zang, SQ

Liu, KZ ^{[1
]}

Lin, S

Liang, J

Guo, XY

Zhang, ZJ

机构：

[1] Henan Univ, Dept Chem, Kaifeng 475001, Peoples R China

[2] Tsinghua Univ, Dept Mech, Beijing 100084, Peoples R China

[3] Henan Univ, Key Lab Lubricat & Funct Mat, Kaifeng 475001, Peoples R China

来源：

ANALYTICAL LETTERS | 2002年 / 35卷 / 14期

关键词：

anodic stripping voltammetry; carbon nanotubes; chemically modified electrode; xanthine determination;

D O I：

10.1081/AL-120016098

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electrochemistry of xanthine (Xa) was studied by CV at a glassy carbon electrode modified with carbon nanotubes. A well defined, sensitive oxidation wave of xanthine and a small reduction wave were obtained. Based on the oxidation peak, a method for determination of xanthine with semi-derivative anodic stripping voltammetry at a glassy carbon electrode modified with carbon nanotubes was investigated. The stripping peak current is proportional to the concentration of Xa over the range 2.0 x 10(-7) -2.0 x 10(-5) M with 1-min accumulation. The detection limit is 4.0 x 10(-9) mol/L with 3-min accumulation. The method has been successfully applied to the determination of xanthine in human serum.

引用

页码：2233 / 2244

页数：12

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