Its catalytic current was linear with the concentration of h2o2 . most of interference was effectively eliminated and the inactivity of hrp under the too low potential to catalytize the reduction of h2o2 was avoided due to the enhanced potential of nr by zp in the composite film . while the silver colloid in the composite film enhanced the capability of zp to adsorb nr and prevented effectively nr from leaching off 4 、上修饰电极与辣根过氧化酶相耦合制成酶电极,显著的催化了过氧化氢的还原,磷酸锆提高了中性红的氧化还原电位,大大的降低了测定的干扰,并有效的避免了辣根过氧化酶在过低的还原电位下失效,纳米银增强了膜对中性红的吸附,有效的防止了其流失。