Apparatus for the detection and for the quantitative determination of nitrogen dioxide in a gas mixture and a method for making the apparatus

摘要

The invention relates to an apparatus for the detection and for the quantitative determination of nitrogen dioxide in a gas mixture using an electrochemical cell which has a two-electrode or three-electrode system and an electrolyte, and a method for making the apparatus. The electrolyte contains an acid medium into which is mixed from 0.1 to 70 mol % of sulphuric acid or hydrogen sulphate or sulphate or a combination of these substances. <IMAGE>