本文提出一种新的电化学分析方法——挥气电位法。是一种利用多孔膜气敏电极直接响应气体物质的方法。使被测定的物质由液相中通过化学反应转变为气态物质,再用载气把它带至多孔气敏电极上产生电极反应,测量其电位的变化,是一种直接电位法。它与选择性电极法相似,而与气相色谱法也有共同之点。利用挥气电位法可以测定Hg、As、Sb、Sn、S、I和CN等等离子。 In this paper, we propose a new electrochemical analysis method, the swing potential method. Is a use of porous membrane gas sensor direct response to gaseous substances. So that the measured substance from the liquid phase through the chemical reaction into gaseous substances, and then carried it to the gas carrier gas electrode to produce electrode reactions, measuring the potential changes, is a direct potential method. It is similar to the selective electrode method, but also has something in common with gas chromatography. Using the gas potential method can be measured Hg, As, Sb, Sn, S, I and CN plasma.