酶电极最初以制备测定葡萄糖的电极而取名。只要将一层固定化酶膜包在特殊的离子选择性电极外面,就作成了酶电极。近年已制备了测定多种化合物的酶电极,将有可能在工业、临床、环境监测分析中得到广泛应用。尿素是肾、肝功能的重要指标。故曾有人制备了以铵离子选择性电极和CO_2选择性电极为基础的尿素酶电极用于测定尿素,但受到K~+、Na~+离子的干扰,后来又制备出只对NH_3 The enzyme electrode was originally named for the preparation of electrodes for the determination of glucose. As long as a layer of immobilized enzyme membrane wrapped in a special ion selective electrode outside, it made the enzyme electrode. In recent years, a variety of compounds have been prepared for the enzyme electrode, it will be possible in industrial, clinical, environmental monitoring and analysis has been widely used. Urea is an important indicator of kidney and liver function. Therefore, it has been prepared ammonium ion selective electrode and CO 2 selective electrode-based urease electrode for the determination of urea, but by K ~ +, Na ~ + ions interference, and later prepared only for NH_3