Analytical Sciences

Abstract − Analytical Sciences, 22(6), 895 (2006).

Voltammetric Behavior and Determination of 17 β-Estradiol at Multi-Wall Carbon Nanotube-Nafion Modified Glassy Carbon Electrode
Norifumi TERUI, Bunshi FUGETSU, and Shunitz TANAKA
Section of Integrated Environmental Science, Research Faculty of Environmental Earth Science, Hokkaido University, N10W5, Kita-ku, Sapporo 060-0810, Japan
For the purpose of low cost and sensitive electrochemical detection of 17 β-estradiol (E2), a multi-wall carbon nanotube (MWNT)-Nafion modified electrode was fabricated. The MWNT modified electrode shows enhancement for the anodic peak current of E2 compared with the value obtained using a bare electrode. The anodic peak current measured by square wave voltammetry after 5 min open-circuit accumulation was proportional to the concentration of E2 over the range of 2.5 × 10-7 to 10 10-6 M, and a detection limit of 1 × 10-8 M was obtained.