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利用两支对称的离子选择性电极进行差示连续分析的原理,在国外文献中早有过论述,但我们尚未见有具体的报导。近年来,我们以自制的液膜型硝酸根电极组成浓差电池,用标准添加技术连续测定了复杂的水冶流程样品中的硝酸盐浓度,获得了良好的结果。但该法需要用专门设计的双高阻输入的直读式离子计相配合,而且对电极对称性的要求比较严格,所以推广应用尚有一定困难。 Light, Fletcher等曾先后介绍过以同一电极膜的两侧组成的浓差电池进行连续分析的方法,前者基于间接分析原
The principle of differential continuous analysis using two symmetrical ion-selective electrodes has been discussed in foreign literature, but we have not yet seen a specific report. In recent years, we have made a concentration cell with self-made liquid-film type nitrate electrode, and continuously measured the concentration of nitrate in the complex water-melting process sample by using standard additive technology. Good results have been obtained. However, this method requires the use of specially designed dual high resistance input direct reading ion meter with the match, but also the electrode symmetry requirements more stringent, so the promotion and application there are still some difficulties. Light, Fletcher, etc. have introduced a continuous analysis of the concentration of cells on both sides of the same electrode membrane for continuous analysis, the former based on indirect analysis of the original