Abstract
In this work, a multi-wall carbon nanotube (MWNT) film-modified glassy carbon electrode (GCE) was constructed for the determination of 8-hydroxydesoxyguanosine (8-OHdG). The electrochemical behaviors of 8-OHdG were examined using cyclic voltammetry (CV) and linear sweep voltammetry (LSV), suggesting that MWNT film facilitates the electron transfer of 8-OHdG and then significantly enhances the oxidation peak current of 8-OHdG. Finally, a sensitive and simple electrochemical method with a good linear relationship in the range of 8.0 × 10−8 ∼ 5.0 × 10−6 mol 1−1, was developed for the determination of 8-OHdG. The detection limit is 9.0 × 10−9 mol 1−1 for 6-min accumulation. This newly-proposed method was successfully used to detect 8-OHdG in urine samples.
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