The membrane-modified electrode was used to construct amperometric electrochemical biosensors for the determination of trace penicillin in milk.

• 用戊二醛-牛血清白蛋白交联法将青霉素酶、纳米金胶和氧化苏木精同时修饰在铂电极上,制成电流型电化学生物传感器。