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一、引言我们所熟知的PH玻璃电极是离子选择电极之一,适用于测定溶液中H~+离子的活度.用于测定其它离子活度的离子选择电极,近年来得到了迅速的发展.特定的离子选择电极在溶液中产生的膜电位的大小,只对应于特定离子的活度(浓度),通过简单的电势测量,就可以直接测定溶液中某一离子的活度(浓度).这类仪器测量设备简单,操作方便,无损于被分析的溶液,并具有快速、准确、可连续测定、便于自动记录等优点.因此,这门技术除现在已在地质、冶金、海洋、环保、医学、土壤分析等领域获得广泛应用外,在化工中也有着广阔的前景.
I. INTRODUCTION The PH glass electrode we are familiar with is one of the ion selective electrodes and is suitable for measuring the activity of H ~ + ions in solution.The ion selective electrode for measuring the activity of other ions has been rapidly developed in recent years. Ion-selective electrode produces a membrane potential in solution that corresponds to the activity (concentration) of a particular ion, and simply measures the activity (concentration) of a particular ion in solution by a simple potential measurement. The instrument has the advantages of simple equipment, easy operation, no damage to the solution under analysis, fast, accurate and continuous measurement, convenient automatic recording, etc. Therefore, this technology has been widely used in geology, metallurgy, marine, environmental protection, medicine, Soil analysis and other fields have been widely used, in the chemical industry also has broad prospects.