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离子选择电极是一种直接测定液体样品中某一离子活度(浓度)的工具,它具有结构简单、响应速度快、所需仪器简便等优点,非常适用于对工艺流程样品中一种或多种离子进行自动监测。目前,离子选择电极的流线分析正成为电极应用的主要研究方向之一。离子选择性电极的流线分析,大体有两种形式:一种是间隙式,即通过程序控制系统定时取样进行自动分析;另一种是连续式,即用电极体系自动连续监测溶液中特定离子的浓度变化。七十年代初,Riseman、Cammann等人相继提出利用两支相同的离子选择性电极进行差示测量的原理,并讨论了这一技术用于流线分析的可能性及其优点,但至今尚未见到实际应用方面的报导。本文在硝酸根电极研制成功的基础上,用两支对称性很好的硝酸根电极分别做指示电极和参比电极,根据标准添加技术的原理,进行差示
Ion selective electrode is a direct measurement of a sample of ions in the liquid activity (concentration) of the tool, which has the advantages of simple structure, fast response, the required equipment, etc., is very suitable for the process of sample one or more Ion species for automatic monitoring. At present, the streamline analysis of ion-selective electrodes is becoming one of the main research directions of electrode applications. Ion-selective electrode streamline analysis, there are generally two forms: one is the gap type, that is, through the timing control of the program control system for automatic analysis; the other is continuous, that is, the electrode system automatically and continuously monitoring the solution of specific ions The concentration changes. In the early 1970s, Riseman, Cammann and others successively proposed the principle of using two identical ion-selective electrodes for differential measurement, and discussed the possibility of using this technique for streamline analysis and its advantages, but it has not yet seen To the practical application of the report. In this paper, based on the successful development of the nitrate electrode, the two symmetrical nitrate electrodes are respectively used as the indicating electrode and the reference electrode. According to the principle of standard adding technique, differential display