Process for determining the ozone content of ozone-containing gas mixtures

Claim 1

In a process for the determination of the ozone content of ozone-containing gas mixtures containing nitrogen oxides according to which ozone is converted to oxygen, with the production of heat, by means of a catalyst; the catalyst consists essentially of a mixture of cupric oxide and manganese dioxide, whereby the occurring temperature increase serves as a measure of the ozone concentration, whereby the ozone of a stream of the gas mixture is completely converted to oxygen, and wherein the catalyst is heat insulated; the improvement being channeling the gas mixture through an adsorbent of aluminosilicate to extract nitrogen oxide and water before measuring the ozone content, with the aluminosilicate containing 2 to 20% by weight of aluminum oxide, and the aluminosilicate being of spherical shape with a particle diameter of 2 to 5 mm and a specific area of 200 to 650 m 2 /g and an average pore diameter of 5 to 10 mm.