Graphite oxide(GO) prepared by an improved Hummers method was reduced to graphene(Gr) by a hydrothermal method with Na BH4 as a reductant. Gr sample was characterized by scanning electron microscopy, X-ray diffraction and BET specific surface area analysis, respectively. The Gr-PDA modified glass carbon electrode(Gr-PDA/GCE) was designed and constructed for the simultaneous determination of hydroquinone(HQ), catechol(CC) and resorcinol(RC). The electrochemical behaviors of HQ, CC and RC on the Gr-PDA/GCE were investigated by cyclic voltammetry(CV) and differential pulse voltammetry(DPV) techniques. The results show that there are the three detections with a high peak current on the modified electrode duo to the synergetic effects of Gr and PDA, the linear response ranges for HQ and CC are 40.2–1559.6 and 24.7–1105.0 μM and the detection limits(S/N=3) are 13.4 and 8.2 μM, respectively.
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