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

摘要

An electrochemical sensor for hydroquinone (HQ) using beta-cyclodextrin/ poly(N-acetylaniline)/carbon nanotube composite (beta-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 beta-CD,the analytical response of the beta-CD/PAA/MWNTs film to the electrochemical behavior of HQ was better than that of a beta-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 x 10~(-6) to 5 x 10~(-3) mol 1~(-1) and the detection limit was 8 x 10~(-7) mol 1~(-1).This electrochemical sensor showed excellent reproducibility,stability and recovery for the determination of HQ.