▎ 摘　　要

Graphene nanosheets were directly deposited onto a glassy carbon electrode through cyclic voltammetric reduction of a graphene oxide colloidal solution. The resulting electrodes were characterized by electrochemical methods and scanning electron microscopy. The application of the graphene modified electrodes in simultaneous determination of hydroquinone and catechol was investigated. (C) 2010 Elsevier B.V. All rights reserved.