Radical polymerization methods is used on the surface of gold electrodes to synthesize propylene sunny and acrylic acid copolymer porous membrane and used as the carrier for fixed enzymes.Through the glutaraldehyde

horseradish peroxidase is crosslink fixed on the propylene acrylate copolymer-the porous membrane to fabricate hydrogen peroxide biological sensors.Sulfide restrain the activity of enzyme and decreases the reduction current sulfide is determined according to the extent of the current decrease.Acrylate copolymer propylene porous membrane has high adsorption ability

and large surface area to improve the detection lower limit of sensor. Results show that fixing the horseradish peroxidase on gold electrodes to act as a kind of test of sulfide

restrain type sensor has good response performance.