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Citation: ZHANG Sheng-Hui, HU Sheng-Shui. Voltammetric Determination of Ethynylestradiol Using Multi-wall Carbon Nanotube Modified Glassy Carbon Electrode[J]. Chinese Journal of Applied Chemistry, ;2005, 22(8): 857-860. shu

Voltammetric Determination of Ethynylestradiol Using Multi-wall Carbon Nanotube Modified Glassy Carbon Electrode

ZHANG Sheng-Hui ^a,, ,
HU Sheng-Shui ^b

1.
a Department of Chemistry, Hubei Institute for Nationalities, Enshi 445000;
2.
b Department of Chemistry, Wuhan University, Wuhan

Corresponding author: ZHANG Sheng-Hui,
Received Date: 18 October 2004
Available Online: 18 January 2005
Fund Project: 国家自然科学基金(60171023) (60171023)湖北省教育厅自然科学基金(2002008010)资助项目 (2002008010)

An electrochemical method was developed for the determination of ethynylestradiol based on the electrocatalytic activity of multi-wall carbon nanotube (MWNT).Owing to the unique and extraordinary properties of MWNT,the oxidation peak current of ethynylestradiol increases remarkably on a MWNT-modified glassy carbon electrode (GCE),accompanied by the lowering of oxidation overpotential.The oxidation peak current varies linearly with the concentration of ethynylestradiol in the range from 1×10^-7 to 4×10^-5 mol/L.The detection limit is 3×10^-8 mol/L after open-circuit accumulation for 3 min.The relative standard deviation (RSD) of ten measurements is 6.2% for 1×10^-6 mol/L ethynylestradiol,indicating the good reproducibility.This proposed method was successfully employed in detecting ethynylestradiol in ethynylestradiol tablets.
- multi-wall carbon nanotube,
- ethynylestradiol,
- chemically modified electrode,
- electrochemical determination
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