In order to realize in-situ and on-site detection of carbohydrate content in real samples

an enzyme-free carbohydrate sensor is prepared.Graphene（GR）

multi-walled carbon nanotubes（CNT） and gold nanoparticles（GR-MWCNT-Au） are used as the modified materials

which are modified on the surface of interdigital gold electrode by drop coating method to catalyze the oxidation of several carbohydrates（glucose

fructose

galactose

mannose and xylose）.The structures of these carbohydrates are similar

and the catalytic reactions are also similar

indicating that the constructed sensor can be used to detect these carbohydrates.The detection range of the sensor is wide

and the recovery rate of the actual sample is between 99.45 %～104.39 %

which indicates that the sensor has high practical application potential.