定电位电解法测定烟道内二氧化硫准确性探讨

目前,环境监测部门对烟道内二氧化硫浓度的测定普遍采用定电位电解法来完成,其主要原理是二氧化硫气体在传感器的电解槽内发生氧化还原反应,通过产生的扩散电流确定二氧化硫浓度,此方法快捷、简便,但准确程度却受到多方面因素影响。本文即对影响该方法准确程度的诸多因素做系统分析,并对检测过程应注意的环节做简要说明。

The method of constant electric potential has been widely used in measurement of sulfur dioxide in flue gases .the method was based on the phenomena that the a kind of oxidation reduction reaction was taken place in electrobath installed in sensor, therefore by measuring diffused electric current, the concentration of sulfur dioxide can be measured with the merits of speediness and handiness, however its accuracies were influenced by various factors, upon that based on the analysis of factors impacting accuracy, relevant countermeasures against the impacts were put forward.