In the paper, graphene has been synthesized by Hummers method. A chitosan (CTS) and graphene (GR) modified carbon paste electrode was prepared by dispensing method, and the electrochemical behavior of bisphenol A (BPA) on the electrochemical sensor modified by chitosan and grapheme (CTS/GR/CPE) was investigated by cyclic voltammetry (CV) and liner sweep stripping voltammetry (LSSV). The studies indicated that bisphenol A showed a good electroeatalytic response at the CTS/GR/CPE in Na2 HPO4-NaH2PO4 (pH = 7.4) yielding one sensitive...