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本文介绍了用于连续自动测定大气中SO_2,H_2S等污染物浓度的三电极库仑池的研制过程。该库仑池是在贝克曼同类仪器库仑池的基础上经过较大改进而制成的,库仑池有三个电极:阳极、阴极、参比电极。应用恒电流库仑法测量大气中ppb级SO_2,H_2S浓度。在研制过程中,应用比较简单的实验手段解决了复杂的电化学反应问题。使库仑池的吸收效率,响应时间、噪音、电介液的更新和补充等问题得到了较好的解决。响应时间达到1分15秒左右,比贝克曼库仑池提高了3～4倍,并且具有结构简单,维护保养方便的优点。
This article describes the development of a three-electrode coulomb cell for continuous and automatic determination of SO 2, H 2 S and other pollutants in the atmosphere. The Coulomb pool is made on the basis of Beckman’s Coulometric Pool, and has three electrodes: the anode, the cathode, and the reference electrode. Application of constant current coulometry to measure atmospheric ppb level SO_2, H_2S concentration. In the development process, the application of relatively simple experimental methods to solve the complex electrochemical reaction problems. So that the Coulomb pool absorption efficiency, response time, noise, dielectric fluid update and replenishment and other issues have been better resolved. Response time of 1 minute 15 seconds or so, than the Beckman Coulomb pool increased by 3 to 4 times, and has the advantages of simple structure, easy maintenance.