A novel alcohol sensor is made by using indium tin oxides（ITO） electrode

whose surface is modified by carboxylated multi-walled carbon nanotubes（MWCNTs） absorbed a thin Prussian blue film as electron mediator.The sensor’s function had been investigated by cyclic voltammetry and chronoamperometry.The experimental results demonstrate that sensor exhibited a linear range of 0.5

1

0 mmol/L with a correlation coefficient of 0.996 8.In the case of S/N=3

the detection limit is 0.07 mmol/L.The alcohol sensor not only have the advantages of easy to prepare

economic and practical

but also have good accuracy

sensitivity and anti-interference character.