Voltammetric Determination of Hydroquinone using β‐Cyclodextrin/Poly(N‐Acetylaniline)/Carbon Nanotube Composite Modified Glassy Carbon Electrode

Abstract

An electrochemical sensor for hydroquinone (HQ) using β‐cyclodextrin/poly(N‐acetylaniline)/carbon nanotube composite (β‐CD/PAA/MWNTs) modified glassy carbon electrode has been successfully developed. Based on the synergistic effect of MWNTs and conducting PAA polymer and the accumulation effect of β‐CD, the analytical response of the β‐CD/PAA/MWNTs film to the electrochemical behavior of HQ was better than that of a β‐CD/PAA film, a PAA/MWNTs film, a PAA film, or a bare glassy carbon (GC) electrode. Under the conditions chosen, the anodic currents increased linearly with HQ concentration from 1×10⁻⁶ to 5×10⁻³ mol l⁻¹ and the detection limit was 8×10⁻⁷ mol l⁻¹. This electrochemical sensor showed excellent reproducibility, stability and recovery for the determination of HQ.

Keywords:

• Hydroquinone
• β‐cyclodextrin
• carbon nanotube
• poly(N‐acetylaniline)

Acknowledgments

This work was supported by Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP).