▎ 摘　　要

A highly sensitive electrochemical sensor for the simultaneous determination of catechol (CC) and hydroquinone (HQ) was manufactured by electrochemical polymerization of alizarin red S (ARS) onto graphene doped with B and N on a glassy carbon electrode (GCE) using cyclic voltammetry (CV). The composite film showed excellent electrocatalytic activity and reversibility toward the oxidation of both CC and HQ in 0.1 M phosphate buffer solution (PBS, pH 6.5). Synchronously, the oxidation peak potentials of CC and HQ become separated by 101 mV, which ensured the anti-interference ability of the sensor and made simultaneous detection of CC and HQ possible in real samples. The peak currents increased linearly with their concentration over the range of 1.0 x 10(-6) to 1.0 x 10(-4) M, and the detection limits for CC and HQ were 1.1 x 10(-7) M and 1.9 x 10(-7) M (S/N = 3), respectively. The developed sensor was successfully examined for real sample analysis with lake water and it showed a stable and reliable recovery data. (C) 2014 The Electrochemical Society. All rights reserved.