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气敏电极是由作为指示电极的离子敏感电极和参比电极组成的一对电极,装置在气敏电极外套管内,其中充有内电解液,管的端部装有透气膜,把内电解液和外部试液隔开。试液中溶解的气体扩散透入透气膜,使内电解液中给定离子的活度发生变化。因此,气敏电极实质上是基于利用介面化学反应敏化的电极。为了测定环境样品特别是水体中的氨(氮),我们利用湖南大学化工系制造的气敏氨电极,用于天然水、工业废水、生活
The gas sensing electrode consists of a pair of electrodes consisting of an ion sensing electrode and a reference electrode as indicating electrodes. The gas sensing electrode is arranged inside the gas sensing electrode outer sleeve and is filled with an inner electrolyte. The end of the tube is provided with a gas permeable membrane. The inner electrolyte Separated from external test solution. The gas dissolved in the test solution diffuses through the gas permeable membrane to change the activity of a given ion in the internal electrolyte. Therefore, the gas sensing electrode is essentially based on an electrode sensitized by an interface chemical reaction. In order to determine the ammonia (nitrogen) in environmental samples, especially in water, we use the gas-sensing ammonia electrode manufactured by Hunan University Department of Chemical Engineering for natural water, industrial wastewater, living