己烯雌酚在多壁碳纳米管修饰玻碳电极上的伏安行为及其测定
[Voltammetric behaviors of diethylstilbestrol and its determination at multi-wall carbon nanotubes modified glassy carbon electrode].
作者信息
Sun Yan-yi, Wu Kang-bing, Hu Sheng-shui
机构信息
Department of Chemistry, Wuhan University, Wuhan 430072, China.
出版信息
Yao Xue Xue Bao. 2003 May;38(5):364-7.
AIM
To fabricate multi-wall carbon nanotube (MWNT) modified electrode and study the electrochemical behaviors of diethylstilbestrol at the MWNT-modified electrode.
METHODS
Cyclic voltammetry and linear sweep voltammetry.
RESULTS
The oxidation peak current of diethylstilbestrol increased remarkably and the peak potential shifted negatively at the MWNT-dihexadecyl hydrogen phosphate (DHP) modified glassy carbon electrode (GCE), in contrast to that at the bare GC electrode and DHP-modified GC electrode. The oxidation peak current is linear with the concentration of diethylstilbestrol over the range from 1 x 10(-8) to 2 x 10(-6) mol.L-1. The detection limit was 2.5 x 10(-9) mol.L-1. The relative standard deviation (n = 10) was 2.9% for 1 x 10(-6) mol.L-1 diethylstilbestrol.
CONCLUSION
The MWNT-DHP modified GCE exhibits catalytic activity to the oxidation of diethylstilbestrol.
目的
制备多壁碳纳米管（MWNT）修饰电极并研究己烯雌酚在该修饰电极上的电化学行为。
方法
循环伏安法和线性扫描伏安法。
结果
与裸玻碳电极和磷酸二己酯修饰的玻碳电极相比，己烯雌酚在MWNT - 磷酸二己酯（DHP）修饰的玻碳电极（GCE）上的氧化峰电流显著增加且峰电位负移。氧化峰电流与己烯雌酚浓度在1×10⁻⁸至2×10⁻⁶mol·L⁻¹范围内呈线性关系。检测限为2.5×10⁻⁹mol·L⁻¹。对于1×10⁻⁶mol·L⁻¹己烯雌酚，相对标准偏差（n = 10）为2.9%。
结论
MWNT - DHP修饰的GCE对己烯雌酚的氧化具有催化活性。
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