A simple,low cost and high sensitivity electrochemical sensor was prepared by covering a layer of porous graphene/gold nanocomposites on glassy carbon electrode(GCE)for the determination of rutin.The effects of deposition circle number and pH value of buffer on rutin reaction were investigated.Under the optimized conditions,the concentration of rutin has a good linear relationship with the oxidation peak current in the range of 1nmol/L~1μmol/L and 1μmol...