alpha-cyclodextrin incorporated carbon nanotube-coated electrode for the simultaneous determination of dopamine and epinephrine

作者：Wang GY^*; Liu XJ; Luo GA; Wang ZH

来源：Chinese Journal of Chemistry, 2005, 23(3): 297-302.

• dopamine
• epinephrine
• alpha-cyclodextrin
• carbon nanotube-coated electrode

An alpha-cyclodextrin (alpha-CD) incorporated carbon nanotube (CNT)-coated electrode was fabricated and applied to the simultaneous determination of dopamine (DA) and epinephrine (EP). It has been found that the modified electrode shows strong catalytic effects on the electro-separation of DA and EP, and the cathodic potential difference between DA and EP is about 390 mV. The reducing peak current is proportional to DA and EP concentrations in the range of 2.0 X 10(-6)-1.0 X 10(-3) and 1.0 X 10(-6)-1.0 X 10(-3) mol.L-1, respectively. Their detection limits can reach 1 X 10(-6) and 5 X 10(-7) mol.L-1, respectively. Because the oxidation of ascorbic acid (AA) is an irreversible reaction in alpha-CD/CNT film, the interference of AA in determination of DA and EP is eliminated.

• 出版日期2005-3
• 单位清华大学; 南昌师范学院